/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:20:49,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:20:49,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:20:49,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:20:49,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:20:49,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:20:49,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:20:49,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:20:49,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:20:49,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:20:49,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:20:49,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:20:49,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:20:49,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:20:49,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:20:49,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:20:49,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:20:49,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:20:49,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:20:49,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:20:49,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:20:49,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:20:49,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:20:49,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:20:49,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:20:49,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:20:49,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:20:49,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:20:49,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:20:49,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:20:49,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:20:49,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:20:49,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:20:49,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:20:49,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:20:49,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:20:49,580 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:20:49,580 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:20:49,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:20:50,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:20:50,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:20:50,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:20:50,027 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:20:50,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2021-05-06 08:20:50,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9522f81e4/5f334035a9e64b83bc82cc26fb5c9edc/FLAG25f58ebcd [2021-05-06 08:20:50,655 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:20:50,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2021-05-06 08:20:50,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9522f81e4/5f334035a9e64b83bc82cc26fb5c9edc/FLAG25f58ebcd [2021-05-06 08:20:51,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9522f81e4/5f334035a9e64b83bc82cc26fb5c9edc [2021-05-06 08:20:51,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:20:51,122 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:20:51,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:51,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:20:51,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:20:51,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79583e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51, skipping insertion in model container [2021-05-06 08:20:51,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:20:51,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:20:51,360 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2021-05-06 08:20:51,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:51,404 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:20:51,414 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2021-05-06 08:20:51,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:20:51,484 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:20:51,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51 WrapperNode [2021-05-06 08:20:51,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:20:51,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:20:51,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:20:51,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:20:51,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... [2021-05-06 08:20:51,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:20:51,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:20:51,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:20:51,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:20:51,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:20:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:20:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:20:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:20:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:20:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:20:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:20:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:20:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:20:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:20:52,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:20:52,013 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:20:52,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:52 BoogieIcfgContainer [2021-05-06 08:20:52,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:20:52,014 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:20:52,014 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:20:52,015 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:20:52,017 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:52" (1/1) ... [2021-05-06 08:20:52,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:52 BasicIcfg [2021-05-06 08:20:52,044 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:20:52,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:20:52,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:20:52,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:20:52,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:20:51" (1/4) ... [2021-05-06 08:20:52,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f94c6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:52, skipping insertion in model container [2021-05-06 08:20:52,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:20:51" (2/4) ... [2021-05-06 08:20:52,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f94c6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:52, skipping insertion in model container [2021-05-06 08:20:52,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:52" (3/4) ... [2021-05-06 08:20:52,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f94c6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:52, skipping insertion in model container [2021-05-06 08:20:52,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:52" (4/4) ... [2021-05-06 08:20:52,050 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.cJordan [2021-05-06 08:20:52,053 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:20:52,056 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:20:52,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:20:52,081 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:20:52,081 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:20:52,081 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:20:52,081 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:20:52,081 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:20:52,081 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:20:52,081 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:20:52,081 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:20:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:20:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:20:52,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:52,096 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:52,097 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-06 08:20:52,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:52,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734484217] [2021-05-06 08:20:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:52,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:20:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:52,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:20:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:20:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:52,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:52,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734484217] [2021-05-06 08:20:52,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734484217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:52,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:52,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:20:52,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366436067] [2021-05-06 08:20:52,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:20:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:20:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:52,416 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:52,593 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-06 08:20:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:20:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:20:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:52,600 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:20:52,600 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:20:52,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:20:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 08:20:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 08:20:52,624 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 08:20:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:52,624 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 08:20:52,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 08:20:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:20:52,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:52,626 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:52,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:20:52,626 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-06 08:20:52,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:52,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135189290] [2021-05-06 08:20:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:52,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897685984] [2021-05-06 08:20:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:20:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:52,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:52,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:52,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135189290] [2021-05-06 08:20:52,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:52,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897685984] [2021-05-06 08:20:52,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897685984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:52,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:52,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:20:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953484853] [2021-05-06 08:20:52,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:20:52,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:20:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:20:52,835 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:52,850 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:20:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:20:52,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:20:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:52,851 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:20:52,851 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:20:52,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:20:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:20:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 08:20:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 08:20:52,856 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 08:20:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:52,856 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 08:20:52,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 08:20:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 08:20:52,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:52,857 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:53,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:20:53,075 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-06 08:20:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181067518] [2021-05-06 08:20:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:53,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759865327] [2021-05-06 08:20:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:53,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:53,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181067518] [2021-05-06 08:20:53,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:53,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759865327] [2021-05-06 08:20:53,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759865327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:53,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:53,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:20:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985737289] [2021-05-06 08:20:53,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:53,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:53,219 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:53,277 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-06 08:20:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 08:20:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:53,279 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:20:53,279 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:20:53,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:20:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 08:20:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 08:20:53,297 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 08:20:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:53,297 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 08:20:53,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 08:20:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:20:53,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:53,298 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:53,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:53,521 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-06 08:20:53,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:53,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909007999] [2021-05-06 08:20:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:53,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:53,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50747544] [2021-05-06 08:20:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:53,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:53,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:53,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909007999] [2021-05-06 08:20:53,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:53,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50747544] [2021-05-06 08:20:53,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50747544] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:53,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:53,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:53,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652647703] [2021-05-06 08:20:53,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:53,701 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:53,729 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 08:20:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:20:53,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 08:20:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:53,731 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:20:53,731 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 08:20:53,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 08:20:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 08:20:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:20:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 08:20:53,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 08:20:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:53,735 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 08:20:53,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 08:20:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:20:53,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:53,754 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:53,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:53,955 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-06 08:20:53,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:53,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130476938] [2021-05-06 08:20:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:53,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:53,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726342494] [2021-05-06 08:20:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:54,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:54,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:54,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:54,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130476938] [2021-05-06 08:20:54,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:54,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726342494] [2021-05-06 08:20:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726342494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:54,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:54,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:20:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183338371] [2021-05-06 08:20:54,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:54,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:54,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:54,196 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:54,299 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-06 08:20:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 08:20:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:54,300 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:20:54,300 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:20:54,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:20:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:20:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:20:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 08:20:54,305 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 08:20:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:54,305 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 08:20:54,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:20:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 08:20:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:20:54,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:54,306 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:54,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:54,521 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-06 08:20:54,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:54,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263547143] [2021-05-06 08:20:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:54,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:54,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886200618] [2021-05-06 08:20:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:54,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263547143] [2021-05-06 08:20:54,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886200618] [2021-05-06 08:20:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886200618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:54,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:54,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:20:54,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534879036] [2021-05-06 08:20:54,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:54,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:54,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:54,693 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:54,727 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-06 08:20:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-06 08:20:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:54,729 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:20:54,729 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:20:54,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:20:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:20:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:20:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 08:20:54,733 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 08:20:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:54,734 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 08:20:54,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 08:20:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 08:20:54,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:54,734 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:54,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:20:54,941 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-06 08:20:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:54,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087391566] [2021-05-06 08:20:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:54,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:54,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374016712] [2021-05-06 08:20:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:55,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:55,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:55,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087391566] [2021-05-06 08:20:55,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:55,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374016712] [2021-05-06 08:20:55,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374016712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:55,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:55,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:55,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243393569] [2021-05-06 08:20:55,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:55,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:55,119 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:55,284 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-06 08:20:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:20:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-06 08:20:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:55,286 INFO L225 Difference]: With dead ends: 131 [2021-05-06 08:20:55,286 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:20:55,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:20:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 08:20:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:20:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 08:20:55,293 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 08:20:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:55,293 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 08:20:55,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 08:20:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:20:55,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:55,294 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:55,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:55,497 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:55,497 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-06 08:20:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:55,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783486301] [2021-05-06 08:20:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:55,505 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:55,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743769178] [2021-05-06 08:20:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:55,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:55,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:55,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:55,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783486301] [2021-05-06 08:20:55,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:55,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743769178] [2021-05-06 08:20:55,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743769178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:55,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:55,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:20:55,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215235416] [2021-05-06 08:20:55,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:55,735 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:55,834 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-06 08:20:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:55,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 08:20:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:55,835 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:20:55,835 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:20:55,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:20:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:20:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:20:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 08:20:55,840 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 08:20:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:55,840 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 08:20:55,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 08:20:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:20:55,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:55,841 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:56,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:56,049 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-06 08:20:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:56,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148836121] [2021-05-06 08:20:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:56,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:56,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318009886] [2021-05-06 08:20:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:56,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:56,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:56,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148836121] [2021-05-06 08:20:56,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318009886] [2021-05-06 08:20:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318009886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:56,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:56,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:20:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508963363] [2021-05-06 08:20:56,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:56,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:56,237 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:56,260 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-06 08:20:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-06 08:20:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:56,264 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:20:56,264 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:20:56,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:20:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 08:20:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:20:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 08:20:56,279 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 08:20:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:56,280 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 08:20:56,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 08:20:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:20:56,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:56,280 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:20:56,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:20:56,488 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-06 08:20:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:56,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894909861] [2021-05-06 08:20:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:56,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:56,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662119922] [2021-05-06 08:20:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:20:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:56,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:56,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894909861] [2021-05-06 08:20:56,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662119922] [2021-05-06 08:20:56,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662119922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:56,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:56,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595521693] [2021-05-06 08:20:56,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:56,707 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:56,780 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-06 08:20:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:20:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:56,781 INFO L225 Difference]: With dead ends: 120 [2021-05-06 08:20:56,782 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 08:20:56,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 08:20:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 08:20:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:20:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 08:20:56,786 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 08:20:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:56,787 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 08:20:56,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 08:20:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:20:56,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:56,787 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:57,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:57,005 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-06 08:20:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:57,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068116768] [2021-05-06 08:20:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:57,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:57,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662959391] [2021-05-06 08:20:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:20:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:20:57,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:57,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068116768] [2021-05-06 08:20:57,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:57,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662959391] [2021-05-06 08:20:57,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662959391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:57,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:57,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:57,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299324817] [2021-05-06 08:20:57,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:57,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:57,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:57,325 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:57,454 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-06 08:20:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:20:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:57,455 INFO L225 Difference]: With dead ends: 152 [2021-05-06 08:20:57,455 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:20:57,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:20:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 08:20:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:20:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 08:20:57,466 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 08:20:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:57,466 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 08:20:57,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 08:20:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:20:57,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:57,467 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:57,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:57,685 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-06 08:20:57,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:57,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98096191] [2021-05-06 08:20:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:57,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:57,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529129722] [2021-05-06 08:20:57,727 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 [2021-05-06 08:20:57,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:20:57,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:57,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98096191] [2021-05-06 08:20:57,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529129722] [2021-05-06 08:20:57,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529129722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:57,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:57,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513508205] [2021-05-06 08:20:57,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:57,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:57,994 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:58,061 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-06 08:20:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-06 08:20:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:58,064 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:20:58,064 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:20:58,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:20:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 08:20:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:20:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 08:20:58,072 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 08:20:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:58,074 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 08:20:58,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:20:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 08:20:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:20:58,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:58,079 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:58,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:20:58,285 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-06 08:20:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:58,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523454932] [2021-05-06 08:20:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:58,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:58,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492848960] [2021-05-06 08:20:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:20:58,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:58,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523454932] [2021-05-06 08:20:58,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:58,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492848960] [2021-05-06 08:20:58,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492848960] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:58,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:58,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:20:58,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308564603] [2021-05-06 08:20:58,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:58,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:58,522 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:20:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:58,637 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-06 08:20:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:58,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:20:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:58,640 INFO L225 Difference]: With dead ends: 193 [2021-05-06 08:20:58,640 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:20:58,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:20:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:20:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:20:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 08:20:58,646 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 08:20:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:58,646 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 08:20:58,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:20:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 08:20:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:20:58,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:58,646 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:58,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:20:58,864 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:58,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-06 08:20:58,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:58,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351167291] [2021-05-06 08:20:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:58,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:58,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339900848] [2021-05-06 08:20:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:20:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:59,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:20:59,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:59,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351167291] [2021-05-06 08:20:59,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:59,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339900848] [2021-05-06 08:20:59,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339900848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:59,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:59,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:59,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711662592] [2021-05-06 08:20:59,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:59,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:59,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:59,313 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:59,542 INFO L93 Difference]: Finished difference Result 202 states and 261 transitions. [2021-05-06 08:20:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:59,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 08:20:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:59,543 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:20:59,543 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:20:59,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:20:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 08:20:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:20:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 08:20:59,549 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 08:20:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:59,549 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 08:20:59,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:20:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 08:20:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:20:59,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:59,550 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:59,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:20:59,765 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-06 08:20:59,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:59,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597646344] [2021-05-06 08:20:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:59,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:59,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620166432] [2021-05-06 08:20:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:59,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:59,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:20:59,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597646344] [2021-05-06 08:20:59,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620166432] [2021-05-06 08:20:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620166432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:59,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:59,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218956990] [2021-05-06 08:20:59,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:59,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:59,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:59,892 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:20:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:59,924 INFO L93 Difference]: Finished difference Result 262 states and 359 transitions. [2021-05-06 08:20:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:20:59,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-06 08:20:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:59,926 INFO L225 Difference]: With dead ends: 262 [2021-05-06 08:20:59,926 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 08:20:59,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 08:20:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 08:20:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:20:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 08:20:59,933 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 08:20:59,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:59,933 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 08:20:59,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:20:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 08:20:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:20:59,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:59,934 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:21:00,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:00,151 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-06 08:21:00,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:00,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499993300] [2021-05-06 08:21:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:00,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:00,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908626062] [2021-05-06 08:21:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:00,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:21:00,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:00,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:21:00,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499993300] [2021-05-06 08:21:00,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908626062] [2021-05-06 08:21:00,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908626062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:00,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:00,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:00,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029336774] [2021-05-06 08:21:00,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:00,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:00,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:00,310 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:00,373 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2021-05-06 08:21:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:00,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-06 08:21:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:00,375 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:21:00,375 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:21:00,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:21:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 08:21:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 08:21:00,384 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 08:21:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:00,384 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 08:21:00,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:21:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 08:21:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:21:00,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:00,385 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:00,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:21:00,602 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:00,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-06 08:21:00,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:00,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857467102] [2021-05-06 08:21:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:00,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:00,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26170338] [2021-05-06 08:21:00,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:00,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:21:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:00,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 08:21:00,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:00,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857467102] [2021-05-06 08:21:00,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:00,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26170338] [2021-05-06 08:21:00,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26170338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:00,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:00,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:00,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783464513] [2021-05-06 08:21:00,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:00,752 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:00,812 INFO L93 Difference]: Finished difference Result 379 states and 553 transitions. [2021-05-06 08:21:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-06 08:21:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:00,815 INFO L225 Difference]: With dead ends: 379 [2021-05-06 08:21:00,815 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 08:21:00,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 08:21:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 08:21:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:21:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 08:21:00,825 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 08:21:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:00,825 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 08:21:00,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:21:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 08:21:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:21:00,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:00,825 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:01,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:21:01,041 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-06 08:21:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:01,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143649967] [2021-05-06 08:21:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:01,046 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:01,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379385573] [2021-05-06 08:21:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:21:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:01,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:21:01,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:01,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143649967] [2021-05-06 08:21:01,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:01,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379385573] [2021-05-06 08:21:01,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379385573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:01,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:01,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:01,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6162773] [2021-05-06 08:21:01,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:01,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:01,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:01,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:01,210 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:21:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:01,418 INFO L93 Difference]: Finished difference Result 339 states and 477 transitions. [2021-05-06 08:21:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 08:21:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:01,420 INFO L225 Difference]: With dead ends: 339 [2021-05-06 08:21:01,420 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 08:21:01,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 08:21:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 08:21:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:21:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 08:21:01,428 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 08:21:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:01,428 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 08:21:01,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:21:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 08:21:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 08:21:01,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:01,429 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2021-05-06 08:21:01,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:21:01,649 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-06 08:21:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:01,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626500311] [2021-05-06 08:21:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:01,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:01,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129764437] [2021-05-06 08:21:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:21:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:01,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:21:01,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:01,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626500311] [2021-05-06 08:21:01,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:01,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129764437] [2021-05-06 08:21:01,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129764437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:01,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:01,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:01,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731244492] [2021-05-06 08:21:01,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:01,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:01,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:01,924 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:02,256 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2021-05-06 08:21:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 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 58 [2021-05-06 08:21:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:02,258 INFO L225 Difference]: With dead ends: 341 [2021-05-06 08:21:02,258 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:21:02,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:21:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 08:21:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 08:21:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 08:21:02,280 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 08:21:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:02,282 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 08:21:02,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 08:21:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:21:02,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:02,283 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:02,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:02,493 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-06 08:21:02,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:02,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651695100] [2021-05-06 08:21:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:02,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:02,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707676414] [2021-05-06 08:21:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:21:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:02,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:02,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651695100] [2021-05-06 08:21:02,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:02,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707676414] [2021-05-06 08:21:02,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707676414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:02,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:02,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:21:02,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413368775] [2021-05-06 08:21:02,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:02,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:02,788 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:02,875 INFO L93 Difference]: Finished difference Result 399 states and 532 transitions. [2021-05-06 08:21:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-06 08:21:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:02,877 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:21:02,877 INFO L226 Difference]: Without dead ends: 399 [2021-05-06 08:21:02,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-06 08:21:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 385. [2021-05-06 08:21:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 261 states have (on average 1.2835249042145593) internal successors, (335), 269 states have internal predecessors, (335), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:21:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 519 transitions. [2021-05-06 08:21:02,887 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 519 transitions. Word has length 63 [2021-05-06 08:21:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:02,887 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 519 transitions. [2021-05-06 08:21:02,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 519 transitions. [2021-05-06 08:21:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:21:02,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:02,888 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:03,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:03,097 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-06 08:21:03,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:03,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491064621] [2021-05-06 08:21:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:03,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:03,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289813274] [2021-05-06 08:21:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:21:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:03,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:03,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491064621] [2021-05-06 08:21:03,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289813274] [2021-05-06 08:21:03,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289813274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:03,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:03,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:03,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243741224] [2021-05-06 08:21:03,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:03,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:03,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:03,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:03,271 INFO L87 Difference]: Start difference. First operand 385 states and 519 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:03,549 INFO L93 Difference]: Finished difference Result 484 states and 635 transitions. [2021-05-06 08:21:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-06 08:21:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:03,551 INFO L225 Difference]: With dead ends: 484 [2021-05-06 08:21:03,551 INFO L226 Difference]: Without dead ends: 484 [2021-05-06 08:21:03,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-06 08:21:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 462. [2021-05-06 08:21:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 312 states have (on average 1.266025641025641) internal successors, (395), 325 states have internal predecessors, (395), 110 states have call successors, (110), 40 states have call predecessors, (110), 39 states have return successors, (107), 96 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:21:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 612 transitions. [2021-05-06 08:21:03,561 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 612 transitions. Word has length 64 [2021-05-06 08:21:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:03,561 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 612 transitions. [2021-05-06 08:21:03,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 612 transitions. [2021-05-06 08:21:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:21:03,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:03,562 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:03,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:21:03,796 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:03,797 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-06 08:21:03,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:03,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385032662] [2021-05-06 08:21:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:03,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:03,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798805043] [2021-05-06 08:21:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:03,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:03,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:21:03,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:03,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385032662] [2021-05-06 08:21:03,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:03,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798805043] [2021-05-06 08:21:03,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798805043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:03,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:03,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:03,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745200382] [2021-05-06 08:21:03,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:03,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:03,991 INFO L87 Difference]: Start difference. First operand 462 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:21:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:04,153 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2021-05-06 08:21:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:21:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-06 08:21:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:04,157 INFO L225 Difference]: With dead ends: 504 [2021-05-06 08:21:04,157 INFO L226 Difference]: Without dead ends: 504 [2021-05-06 08:21:04,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-06 08:21:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 480. [2021-05-06 08:21:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 324 states have (on average 1.2592592592592593) internal successors, (408), 337 states have internal predecessors, (408), 113 states have call successors, (113), 43 states have call predecessors, (113), 42 states have return successors, (110), 99 states have call predecessors, (110), 110 states have call successors, (110) [2021-05-06 08:21:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 631 transitions. [2021-05-06 08:21:04,166 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 631 transitions. Word has length 67 [2021-05-06 08:21:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:04,167 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 631 transitions. [2021-05-06 08:21:04,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:21:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 631 transitions. [2021-05-06 08:21:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:21:04,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:04,167 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:04,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:21:04,385 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-06 08:21:04,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:04,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510784211] [2021-05-06 08:21:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:04,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:04,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091654351] [2021-05-06 08:21:04,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:04,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:04,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:21:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:04,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510784211] [2021-05-06 08:21:04,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091654351] [2021-05-06 08:21:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091654351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:04,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:04,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297572714] [2021-05-06 08:21:04,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:04,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:04,593 INFO L87 Difference]: Start difference. First operand 480 states and 631 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:04,871 INFO L93 Difference]: Finished difference Result 816 states and 1192 transitions. [2021-05-06 08:21:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-06 08:21:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:04,874 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:21:04,874 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:21:04,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:21:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 542. [2021-05-06 08:21:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.2837837837837838) internal successors, (475), 383 states have internal predecessors, (475), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:21:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 730 transitions. [2021-05-06 08:21:04,891 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 730 transitions. Word has length 65 [2021-05-06 08:21:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:04,891 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 730 transitions. [2021-05-06 08:21:04,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 730 transitions. [2021-05-06 08:21:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:21:04,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:04,892 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:05,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:05,093 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-06 08:21:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199187336] [2021-05-06 08:21:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:05,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:05,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343764974] [2021-05-06 08:21:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:05,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:21:05,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:05,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:05,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199187336] [2021-05-06 08:21:05,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:05,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343764974] [2021-05-06 08:21:05,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343764974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:05,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:05,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:21:05,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838884260] [2021-05-06 08:21:05,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:21:05,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:21:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:21:05,267 INFO L87 Difference]: Start difference. First operand 542 states and 730 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:05,378 INFO L93 Difference]: Finished difference Result 544 states and 727 transitions. [2021-05-06 08:21:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-06 08:21:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:05,380 INFO L225 Difference]: With dead ends: 544 [2021-05-06 08:21:05,380 INFO L226 Difference]: Without dead ends: 544 [2021-05-06 08:21:05,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-06 08:21:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2021-05-06 08:21:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.272972972972973) internal successors, (471), 383 states have internal predecessors, (471), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:21:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-05-06 08:21:05,390 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 65 [2021-05-06 08:21:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:05,391 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-05-06 08:21:05,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-05-06 08:21:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:21:05,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:05,392 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:05,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:21:05,609 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-06 08:21:05,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:05,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057242776] [2021-05-06 08:21:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:05,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:05,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292654255] [2021-05-06 08:21:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:21:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 08:21:05,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:05,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057242776] [2021-05-06 08:21:05,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292654255] [2021-05-06 08:21:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292654255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:21:05,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:21:05,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:21:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696452377] [2021-05-06 08:21:05,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:21:05,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:21:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:21:05,855 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:05,896 INFO L93 Difference]: Finished difference Result 588 states and 787 transitions. [2021-05-06 08:21:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:21:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-06 08:21:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:05,904 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:21:05,904 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:21:05,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:21:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:21:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 532. [2021-05-06 08:21:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 376 states have (on average 1.2845744680851063) internal successors, (483), 382 states have internal predecessors, (483), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 08:21:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 714 transitions. [2021-05-06 08:21:05,936 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 714 transitions. Word has length 69 [2021-05-06 08:21:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:05,936 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 714 transitions. [2021-05-06 08:21:05,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 714 transitions. [2021-05-06 08:21:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:21:05,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:05,937 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:06,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:06,152 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:06,152 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-06 08:21:06,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:06,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908213268] [2021-05-06 08:21:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:06,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:06,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768550940] [2021-05-06 08:21:06,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:06,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:06,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:06,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:21:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:06,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908213268] [2021-05-06 08:21:06,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768550940] [2021-05-06 08:21:06,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768550940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:06,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:06,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:21:06,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894388426] [2021-05-06 08:21:06,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:21:06,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:06,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:21:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:21:06,459 INFO L87 Difference]: Start difference. First operand 532 states and 714 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:06,594 INFO L93 Difference]: Finished difference Result 555 states and 735 transitions. [2021-05-06 08:21:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:21:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-06 08:21:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:06,596 INFO L225 Difference]: With dead ends: 555 [2021-05-06 08:21:06,596 INFO L226 Difference]: Without dead ends: 555 [2021-05-06 08:21:06,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-06 08:21:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2021-05-06 08:21:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 386 states have (on average 1.2772020725388602) internal successors, (493), 389 states have internal predecessors, (493), 118 states have call successors, (118), 40 states have call predecessors, (118), 39 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:21:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 726 transitions. [2021-05-06 08:21:06,606 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 726 transitions. Word has length 69 [2021-05-06 08:21:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:06,607 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 726 transitions. [2021-05-06 08:21:06,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 726 transitions. [2021-05-06 08:21:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:21:06,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:06,607 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:06,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:21:06,822 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-06 08:21:06,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:06,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500096693] [2021-05-06 08:21:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:06,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:06,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486065027] [2021-05-06 08:21:06,827 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:06,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:21:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:06,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:06,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:07,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:07,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500096693] [2021-05-06 08:21:07,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:07,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486065027] [2021-05-06 08:21:07,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486065027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:07,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:07,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:07,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452591091] [2021-05-06 08:21:07,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:07,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:07,105 INFO L87 Difference]: Start difference. First operand 544 states and 726 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:07,306 INFO L93 Difference]: Finished difference Result 664 states and 855 transitions. [2021-05-06 08:21:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:21:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-06 08:21:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:07,325 INFO L225 Difference]: With dead ends: 664 [2021-05-06 08:21:07,325 INFO L226 Difference]: Without dead ends: 664 [2021-05-06 08:21:07,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-05-06 08:21:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 631. [2021-05-06 08:21:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 444 states have (on average 1.2545045045045045) internal successors, (557), 448 states have internal predecessors, (557), 135 states have call successors, (135), 52 states have call predecessors, (135), 51 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-06 08:21:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 823 transitions. [2021-05-06 08:21:07,338 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 823 transitions. Word has length 70 [2021-05-06 08:21:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:07,339 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 823 transitions. [2021-05-06 08:21:07,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 823 transitions. [2021-05-06 08:21:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:21:07,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:07,340 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:07,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:21:07,557 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-06 08:21:07,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:07,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438418983] [2021-05-06 08:21:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:07,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:07,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100207731] [2021-05-06 08:21:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:21:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:08,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:21:08,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438418983] [2021-05-06 08:21:08,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100207731] [2021-05-06 08:21:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100207731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:08,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:08,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:08,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032723976] [2021-05-06 08:21:08,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:08,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:08,039 INFO L87 Difference]: Start difference. First operand 631 states and 823 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:08,146 INFO L93 Difference]: Finished difference Result 722 states and 953 transitions. [2021-05-06 08:21:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:21:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 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 70 [2021-05-06 08:21:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:08,148 INFO L225 Difference]: With dead ends: 722 [2021-05-06 08:21:08,148 INFO L226 Difference]: Without dead ends: 722 [2021-05-06 08:21:08,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-06 08:21:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 715. [2021-05-06 08:21:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 519 states have (on average 1.2793834296724471) internal successors, (664), 528 states have internal predecessors, (664), 143 states have call successors, (143), 53 states have call predecessors, (143), 52 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:21:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 946 transitions. [2021-05-06 08:21:08,161 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 946 transitions. Word has length 70 [2021-05-06 08:21:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:08,161 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 946 transitions. [2021-05-06 08:21:08,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:21:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 946 transitions. [2021-05-06 08:21:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:21:08,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:08,162 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:08,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:21:08,379 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-06 08:21:08,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:08,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518393648] [2021-05-06 08:21:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:08,384 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:08,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676099483] [2021-05-06 08:21:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:21:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:21:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:21:08,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518393648] [2021-05-06 08:21:08,687 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:08,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676099483] [2021-05-06 08:21:08,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676099483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:08,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:08,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:08,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215905784] [2021-05-06 08:21:08,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:08,689 INFO L87 Difference]: Start difference. First operand 715 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:21:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:09,213 INFO L93 Difference]: Finished difference Result 942 states and 1295 transitions. [2021-05-06 08:21:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:21:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-06 08:21:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:09,217 INFO L225 Difference]: With dead ends: 942 [2021-05-06 08:21:09,217 INFO L226 Difference]: Without dead ends: 942 [2021-05-06 08:21:09,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:21:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-06 08:21:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 745. [2021-05-06 08:21:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 534 states have (on average 1.2771535580524345) internal successors, (682), 546 states have internal predecessors, (682), 155 states have call successors, (155), 56 states have call predecessors, (155), 55 states have return successors, (151), 142 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-06 08:21:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 988 transitions. [2021-05-06 08:21:09,233 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 988 transitions. Word has length 74 [2021-05-06 08:21:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:09,233 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 988 transitions. [2021-05-06 08:21:09,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:21:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 988 transitions. [2021-05-06 08:21:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:21:09,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:09,234 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:09,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:21:09,452 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:09,452 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-06 08:21:09,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:09,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241130836] [2021-05-06 08:21:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:09,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:09,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117038551] [2021-05-06 08:21:09,458 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 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 [2021-05-06 08:21:09,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:09,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:21:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:21:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241130836] [2021-05-06 08:21:09,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117038551] [2021-05-06 08:21:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117038551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:09,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:09,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:21:09,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116479047] [2021-05-06 08:21:09,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:21:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:21:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:09,676 INFO L87 Difference]: Start difference. First operand 745 states and 988 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:21:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:09,817 INFO L93 Difference]: Finished difference Result 913 states and 1248 transitions. [2021-05-06 08:21:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:21:09,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-05-06 08:21:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:09,829 INFO L225 Difference]: With dead ends: 913 [2021-05-06 08:21:09,830 INFO L226 Difference]: Without dead ends: 913 [2021-05-06 08:21:09,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-05-06 08:21:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 838. [2021-05-06 08:21:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 600 states have (on average 1.3033333333333332) internal successors, (782), 613 states have internal predecessors, (782), 180 states have call successors, (180), 58 states have call predecessors, (180), 57 states have return successors, (176), 166 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-06 08:21:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1138 transitions. [2021-05-06 08:21:09,869 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1138 transitions. Word has length 73 [2021-05-06 08:21:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:09,869 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1138 transitions. [2021-05-06 08:21:09,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:21:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1138 transitions. [2021-05-06 08:21:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:21:09,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:09,870 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:10,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:10,071 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-06 08:21:10,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:10,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410351373] [2021-05-06 08:21:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:10,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:10,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42900536] [2021-05-06 08:21:10,076 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 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 [2021-05-06 08:21:10,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:21:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:21:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:10,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 08:21:10,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:10,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410351373] [2021-05-06 08:21:10,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:10,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42900536] [2021-05-06 08:21:10,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42900536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:10,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:10,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977129228] [2021-05-06 08:21:10,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:10,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:10,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:10,543 INFO L87 Difference]: Start difference. First operand 838 states and 1138 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:21:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:11,045 INFO L93 Difference]: Finished difference Result 920 states and 1253 transitions. [2021-05-06 08:21:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:11,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-05-06 08:21:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:11,058 INFO L225 Difference]: With dead ends: 920 [2021-05-06 08:21:11,058 INFO L226 Difference]: Without dead ends: 920 [2021-05-06 08:21:11,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-06 08:21:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 895. [2021-05-06 08:21:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 636 states have (on average 1.309748427672956) internal successors, (833), 650 states have internal predecessors, (833), 198 states have call successors, (198), 61 states have call predecessors, (198), 60 states have return successors, (194), 183 states have call predecessors, (194), 194 states have call successors, (194) [2021-05-06 08:21:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1225 transitions. [2021-05-06 08:21:11,113 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1225 transitions. Word has length 75 [2021-05-06 08:21:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:11,113 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1225 transitions. [2021-05-06 08:21:11,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:21:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1225 transitions. [2021-05-06 08:21:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 08:21:11,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:11,114 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-06 08:21:11,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:11,329 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-06 08:21:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:11,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632803785] [2021-05-06 08:21:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:11,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:11,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474329808] [2021-05-06 08:21:11,335 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 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 [2021-05-06 08:21:11,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:11,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:21:11,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:11,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632803785] [2021-05-06 08:21:11,586 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:11,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474329808] [2021-05-06 08:21:11,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474329808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:11,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:11,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:11,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890429956] [2021-05-06 08:21:11,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:11,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:11,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:11,587 INFO L87 Difference]: Start difference. First operand 895 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:11,828 INFO L93 Difference]: Finished difference Result 1075 states and 1426 transitions. [2021-05-06 08:21:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-06 08:21:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:11,832 INFO L225 Difference]: With dead ends: 1075 [2021-05-06 08:21:11,832 INFO L226 Difference]: Without dead ends: 1075 [2021-05-06 08:21:11,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-06 08:21:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1045. [2021-05-06 08:21:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 740 states have (on average 1.2797297297297296) internal successors, (947), 755 states have internal predecessors, (947), 229 states have call successors, (229), 76 states have call predecessors, (229), 75 states have return successors, (224), 213 states have call predecessors, (224), 224 states have call successors, (224) [2021-05-06 08:21:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1400 transitions. [2021-05-06 08:21:11,849 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1400 transitions. Word has length 76 [2021-05-06 08:21:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:11,849 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 1400 transitions. [2021-05-06 08:21:11,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:21:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1400 transitions. [2021-05-06 08:21:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:21:11,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:11,850 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:12,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:12,061 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-06 08:21:12,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:12,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360725468] [2021-05-06 08:21:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:12,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:12,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050760469] [2021-05-06 08:21:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:21:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:12,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 08:21:12,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:21:12,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360725468] [2021-05-06 08:21:12,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050760469] [2021-05-06 08:21:12,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050760469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:12,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:12,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:12,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361809578] [2021-05-06 08:21:12,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:12,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:12,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:12,355 INFO L87 Difference]: Start difference. First operand 1045 states and 1400 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:12,755 INFO L93 Difference]: Finished difference Result 1119 states and 1497 transitions. [2021-05-06 08:21:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-05-06 08:21:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:12,770 INFO L225 Difference]: With dead ends: 1119 [2021-05-06 08:21:12,770 INFO L226 Difference]: Without dead ends: 1118 [2021-05-06 08:21:12,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-05-06 08:21:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1053. [2021-05-06 08:21:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2757697456492638) internal successors, (953), 761 states have internal predecessors, (953), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:21:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1403 transitions. [2021-05-06 08:21:12,789 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1403 transitions. Word has length 81 [2021-05-06 08:21:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:12,789 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1403 transitions. [2021-05-06 08:21:12,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1403 transitions. [2021-05-06 08:21:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:21:12,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:12,790 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:13,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 08:21:13,005 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-06 08:21:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:13,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379845664] [2021-05-06 08:21:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:13,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:13,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817302812] [2021-05-06 08:21:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:21:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:21:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:13,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:13,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:13,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379845664] [2021-05-06 08:21:13,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:13,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817302812] [2021-05-06 08:21:13,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817302812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:13,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:13,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:21:13,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035678108] [2021-05-06 08:21:13,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:21:13,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:21:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:21:13,438 INFO L87 Difference]: Start difference. First operand 1053 states and 1403 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:13,622 INFO L93 Difference]: Finished difference Result 1059 states and 1404 transitions. [2021-05-06 08:21:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:21:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-06 08:21:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:13,638 INFO L225 Difference]: With dead ends: 1059 [2021-05-06 08:21:13,638 INFO L226 Difference]: Without dead ends: 1059 [2021-05-06 08:21:13,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-05-06 08:21:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2021-05-06 08:21:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2730923694779117) internal successors, (951), 761 states have internal predecessors, (951), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:21:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1401 transitions. [2021-05-06 08:21:13,670 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1401 transitions. Word has length 87 [2021-05-06 08:21:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:13,671 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1401 transitions. [2021-05-06 08:21:13,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1401 transitions. [2021-05-06 08:21:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:21:13,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:13,671 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:13,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:13,885 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-06 08:21:13,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:13,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064394456] [2021-05-06 08:21:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:13,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:13,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295208469] [2021-05-06 08:21:13,890 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 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 [2021-05-06 08:21:13,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:21:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:14,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:21:14,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064394456] [2021-05-06 08:21:14,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295208469] [2021-05-06 08:21:14,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295208469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:14,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:14,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:21:14,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744573761] [2021-05-06 08:21:14,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:21:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:21:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:21:14,142 INFO L87 Difference]: Start difference. First operand 1053 states and 1401 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:21:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:14,271 INFO L93 Difference]: Finished difference Result 1318 states and 1830 transitions. [2021-05-06 08:21:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:21:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-06 08:21:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:14,275 INFO L225 Difference]: With dead ends: 1318 [2021-05-06 08:21:14,275 INFO L226 Difference]: Without dead ends: 1318 [2021-05-06 08:21:14,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:21:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-06 08:21:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-05-06 08:21:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 808 states have (on average 1.2896039603960396) internal successors, (1042), 830 states have internal predecessors, (1042), 308 states have call successors, (308), 82 states have call predecessors, (308), 81 states have return successors, (304), 285 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-06 08:21:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1654 transitions. [2021-05-06 08:21:14,298 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1654 transitions. Word has length 90 [2021-05-06 08:21:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:14,298 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 1654 transitions. [2021-05-06 08:21:14,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:21:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1654 transitions. [2021-05-06 08:21:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 08:21:14,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:14,299 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:14,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:21:14,513 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-06 08:21:14,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:14,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912085166] [2021-05-06 08:21:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:14,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:14,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351892929] [2021-05-06 08:21:14,521 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:14,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:14,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 08:21:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:14,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:14,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 08:21:15,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:15,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912085166] [2021-05-06 08:21:15,116 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:15,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351892929] [2021-05-06 08:21:15,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351892929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:15,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:15,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:21:15,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744923829] [2021-05-06 08:21:15,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:21:15,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:21:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:15,117 INFO L87 Difference]: Start difference. First operand 1198 states and 1654 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:15,801 INFO L93 Difference]: Finished difference Result 1344 states and 1878 transitions. [2021-05-06 08:21:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:21:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-05-06 08:21:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:15,815 INFO L225 Difference]: With dead ends: 1344 [2021-05-06 08:21:15,815 INFO L226 Difference]: Without dead ends: 1343 [2021-05-06 08:21:15,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:21:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-05-06 08:21:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1301. [2021-05-06 08:21:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 862 states have (on average 1.3004640371229699) internal successors, (1121), 888 states have internal predecessors, (1121), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:21:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1825 transitions. [2021-05-06 08:21:15,857 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1825 transitions. Word has length 88 [2021-05-06 08:21:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:15,857 INFO L480 AbstractCegarLoop]: Abstraction has 1301 states and 1825 transitions. [2021-05-06 08:21:15,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1825 transitions. [2021-05-06 08:21:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:21:15,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:15,859 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:16,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:16,061 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-06 08:21:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:16,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078555946] [2021-05-06 08:21:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:16,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:16,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392556933] [2021-05-06 08:21:16,074 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:16,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:16,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:16,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:16,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078555946] [2021-05-06 08:21:16,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392556933] [2021-05-06 08:21:16,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392556933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:16,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:16,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:16,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363956038] [2021-05-06 08:21:16,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:16,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:16,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:16,455 INFO L87 Difference]: Start difference. First operand 1301 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:16,754 INFO L93 Difference]: Finished difference Result 1331 states and 1852 transitions. [2021-05-06 08:21:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-06 08:21:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:16,759 INFO L225 Difference]: With dead ends: 1331 [2021-05-06 08:21:16,759 INFO L226 Difference]: Without dead ends: 1331 [2021-05-06 08:21:16,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-05-06 08:21:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1312. [2021-05-06 08:21:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 873 states have (on average 1.2966781214203895) internal successors, (1132), 899 states have internal predecessors, (1132), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:21:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1836 transitions. [2021-05-06 08:21:16,798 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1836 transitions. Word has length 91 [2021-05-06 08:21:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:16,799 INFO L480 AbstractCegarLoop]: Abstraction has 1312 states and 1836 transitions. [2021-05-06 08:21:16,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1836 transitions. [2021-05-06 08:21:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:21:16,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:16,800 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:17,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:21:17,033 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-06 08:21:17,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:17,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744535739] [2021-05-06 08:21:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:17,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:17,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236320788] [2021-05-06 08:21:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:21:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:17,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:17,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744535739] [2021-05-06 08:21:17,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236320788] [2021-05-06 08:21:17,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236320788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:17,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:17,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:21:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447768811] [2021-05-06 08:21:17,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:21:17,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:21:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:21:17,470 INFO L87 Difference]: Start difference. First operand 1312 states and 1836 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:17,891 INFO L93 Difference]: Finished difference Result 1338 states and 1858 transitions. [2021-05-06 08:21:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-06 08:21:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:17,895 INFO L225 Difference]: With dead ends: 1338 [2021-05-06 08:21:17,895 INFO L226 Difference]: Without dead ends: 1338 [2021-05-06 08:21:17,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:21:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-06 08:21:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1332. [2021-05-06 08:21:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 893 states have (on average 1.2889137737961927) internal successors, (1151), 919 states have internal predecessors, (1151), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:21:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1855 transitions. [2021-05-06 08:21:17,913 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1855 transitions. Word has length 93 [2021-05-06 08:21:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:17,913 INFO L480 AbstractCegarLoop]: Abstraction has 1332 states and 1855 transitions. [2021-05-06 08:21:17,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1855 transitions. [2021-05-06 08:21:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:21:17,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:17,914 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:18,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:21:18,133 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-06 08:21:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:18,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409335065] [2021-05-06 08:21:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:18,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:18,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292475397] [2021-05-06 08:21:18,143 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:18,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:18,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:21:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:18,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:18,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:18,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409335065] [2021-05-06 08:21:18,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:18,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292475397] [2021-05-06 08:21:18,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292475397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:18,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:18,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:18,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053829316] [2021-05-06 08:21:18,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:18,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:18,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:18,468 INFO L87 Difference]: Start difference. First operand 1332 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:18,693 INFO L93 Difference]: Finished difference Result 1511 states and 2057 transitions. [2021-05-06 08:21:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-06 08:21:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:18,704 INFO L225 Difference]: With dead ends: 1511 [2021-05-06 08:21:18,704 INFO L226 Difference]: Without dead ends: 1511 [2021-05-06 08:21:18,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-05-06 08:21:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1454. [2021-05-06 08:21:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 963 states have (on average 1.2793354101765317) internal successors, (1232), 990 states have internal predecessors, (1232), 387 states have call successors, (387), 104 states have call predecessors, (387), 103 states have return successors, (382), 359 states have call predecessors, (382), 382 states have call successors, (382) [2021-05-06 08:21:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2001 transitions. [2021-05-06 08:21:18,748 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2001 transitions. Word has length 97 [2021-05-06 08:21:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:18,749 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 2001 transitions. [2021-05-06 08:21:18,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2001 transitions. [2021-05-06 08:21:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 08:21:18,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:18,757 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:18,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:21:18,958 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:18,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-06 08:21:18,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:18,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410102381] [2021-05-06 08:21:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:18,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:18,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893637838] [2021-05-06 08:21:18,964 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:19,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:19,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:21:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:19,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:19,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:19,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410102381] [2021-05-06 08:21:19,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:19,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893637838] [2021-05-06 08:21:19,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893637838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:19,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:19,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:21:19,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895864905] [2021-05-06 08:21:19,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:21:19,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:21:19,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:19,294 INFO L87 Difference]: Start difference. First operand 1454 states and 2001 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:19,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:19,678 INFO L93 Difference]: Finished difference Result 1737 states and 2340 transitions. [2021-05-06 08:21:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:21:19,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-06 08:21:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:19,684 INFO L225 Difference]: With dead ends: 1737 [2021-05-06 08:21:19,684 INFO L226 Difference]: Without dead ends: 1737 [2021-05-06 08:21:19,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:21:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-05-06 08:21:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1654. [2021-05-06 08:21:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1097 states have (on average 1.2652689152233363) internal successors, (1388), 1137 states have internal predecessors, (1388), 434 states have call successors, (434), 123 states have call predecessors, (434), 122 states have return successors, (428), 393 states have call predecessors, (428), 428 states have call successors, (428) [2021-05-06 08:21:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2250 transitions. [2021-05-06 08:21:19,706 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2250 transitions. Word has length 98 [2021-05-06 08:21:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:19,707 INFO L480 AbstractCegarLoop]: Abstraction has 1654 states and 2250 transitions. [2021-05-06 08:21:19,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2250 transitions. [2021-05-06 08:21:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:21:19,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:19,708 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:19,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:21:19,925 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:19,926 INFO L82 PathProgramCache]: Analyzing trace with hash 114401441, now seen corresponding path program 1 times [2021-05-06 08:21:19,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:19,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142278604] [2021-05-06 08:21:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:19,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:19,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314089092] [2021-05-06 08:21:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:20,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:21:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:20,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142278604] [2021-05-06 08:21:20,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314089092] [2021-05-06 08:21:20,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314089092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:20,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:20,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:20,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140639876] [2021-05-06 08:21:20,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:20,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:20,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:20,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:20,443 INFO L87 Difference]: Start difference. First operand 1654 states and 2250 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:20,746 INFO L93 Difference]: Finished difference Result 1656 states and 2225 transitions. [2021-05-06 08:21:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-06 08:21:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:20,751 INFO L225 Difference]: With dead ends: 1656 [2021-05-06 08:21:20,751 INFO L226 Difference]: Without dead ends: 1656 [2021-05-06 08:21:20,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-06 08:21:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1631. [2021-05-06 08:21:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1081 states have (on average 1.247918593894542) internal successors, (1349), 1120 states have internal predecessors, (1349), 428 states have call successors, (428), 122 states have call predecessors, (428), 121 states have return successors, (422), 388 states have call predecessors, (422), 422 states have call successors, (422) [2021-05-06 08:21:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2199 transitions. [2021-05-06 08:21:20,807 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2199 transitions. Word has length 99 [2021-05-06 08:21:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:20,807 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 2199 transitions. [2021-05-06 08:21:20,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2199 transitions. [2021-05-06 08:21:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:21:20,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:20,808 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:21,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:21,025 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:21,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1944004338, now seen corresponding path program 3 times [2021-05-06 08:21:21,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:21,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159854303] [2021-05-06 08:21:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:21,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:21,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524152526] [2021-05-06 08:21:21,030 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:21,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:21:21,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:21:21,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:21,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 70 proven. 7 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-05-06 08:21:21,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:21,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159854303] [2021-05-06 08:21:21,642 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:21,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524152526] [2021-05-06 08:21:21,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524152526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:21,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:21,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:21:21,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015145228] [2021-05-06 08:21:21,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:21:21,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:21:21,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:21:21,644 INFO L87 Difference]: Start difference. First operand 1631 states and 2199 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:22,465 INFO L93 Difference]: Finished difference Result 1965 states and 2682 transitions. [2021-05-06 08:21:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:21:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-05-06 08:21:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:22,472 INFO L225 Difference]: With dead ends: 1965 [2021-05-06 08:21:22,472 INFO L226 Difference]: Without dead ends: 1960 [2021-05-06 08:21:22,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-05-06 08:21:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1872. [2021-05-06 08:21:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1231 states have (on average 1.2518277822908204) internal successors, (1541), 1276 states have internal predecessors, (1541), 507 states have call successors, (507), 134 states have call predecessors, (507), 133 states have return successors, (502), 461 states have call predecessors, (502), 502 states have call successors, (502) [2021-05-06 08:21:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2550 transitions. [2021-05-06 08:21:22,530 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2550 transitions. Word has length 104 [2021-05-06 08:21:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:22,530 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 2550 transitions. [2021-05-06 08:21:22,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:21:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2550 transitions. [2021-05-06 08:21:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:21:22,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:22,532 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:22,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:21:22,749 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash -840847847, now seen corresponding path program 4 times [2021-05-06 08:21:22,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:22,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169062579] [2021-05-06 08:21:22,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:22,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:22,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970819754] [2021-05-06 08:21:22,757 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:22,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:22,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-06 08:21:22,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:22,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:22,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:21:23,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169062579] [2021-05-06 08:21:23,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970819754] [2021-05-06 08:21:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970819754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:23,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:23,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:21:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730751337] [2021-05-06 08:21:23,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:21:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:21:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:21:23,917 INFO L87 Difference]: Start difference. First operand 1872 states and 2550 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 08:21:24,831 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-06 08:21:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:25,223 INFO L93 Difference]: Finished difference Result 2055 states and 2812 transitions. [2021-05-06 08:21:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:21:25,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 102 [2021-05-06 08:21:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:25,238 INFO L225 Difference]: With dead ends: 2055 [2021-05-06 08:21:25,238 INFO L226 Difference]: Without dead ends: 2055 [2021-05-06 08:21:25,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1221.0ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:21:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-05-06 08:21:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2031. [2021-05-06 08:21:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1325 states have (on average 1.2588679245283019) internal successors, (1668), 1374 states have internal predecessors, (1668), 561 states have call successors, (561), 145 states have call predecessors, (561), 144 states have return successors, (556), 511 states have call predecessors, (556), 556 states have call successors, (556) [2021-05-06 08:21:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2785 transitions. [2021-05-06 08:21:25,269 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2785 transitions. Word has length 102 [2021-05-06 08:21:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:25,270 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 2785 transitions. [2021-05-06 08:21:25,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 08:21:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2785 transitions. [2021-05-06 08:21:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 08:21:25,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:25,272 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:25,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:25,489 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1448058698, now seen corresponding path program 4 times [2021-05-06 08:21:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:25,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659358397] [2021-05-06 08:21:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:25,495 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:25,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380546800] [2021-05-06 08:21:25,495 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:25,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:25,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:25,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:21:25,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:25,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:25,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:25,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659358397] [2021-05-06 08:21:25,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:25,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380546800] [2021-05-06 08:21:25,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380546800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:25,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:25,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:21:25,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312594982] [2021-05-06 08:21:25,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:21:25,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:21:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:25,914 INFO L87 Difference]: Start difference. First operand 2031 states and 2785 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:26,211 INFO L93 Difference]: Finished difference Result 2143 states and 2902 transitions. [2021-05-06 08:21:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:21:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-05-06 08:21:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:26,215 INFO L225 Difference]: With dead ends: 2143 [2021-05-06 08:21:26,215 INFO L226 Difference]: Without dead ends: 2143 [2021-05-06 08:21:26,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:21:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-05-06 08:21:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2098. [2021-05-06 08:21:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1388 states have (on average 1.2528818443804035) internal successors, (1739), 1420 states have internal predecessors, (1739), 563 states have call successors, (563), 147 states have call predecessors, (563), 146 states have return successors, (558), 530 states have call predecessors, (558), 558 states have call successors, (558) [2021-05-06 08:21:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2860 transitions. [2021-05-06 08:21:26,286 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2860 transitions. Word has length 103 [2021-05-06 08:21:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:26,286 INFO L480 AbstractCegarLoop]: Abstraction has 2098 states and 2860 transitions. [2021-05-06 08:21:26,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2860 transitions. [2021-05-06 08:21:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:21:26,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:26,287 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:26,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:26,517 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 816301515, now seen corresponding path program 4 times [2021-05-06 08:21:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:26,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412296806] [2021-05-06 08:21:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:26,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:26,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314595120] [2021-05-06 08:21:26,524 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:26,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:26,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:26,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:21:26,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:26,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:26,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:26,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412296806] [2021-05-06 08:21:26,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:26,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314595120] [2021-05-06 08:21:26,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314595120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:26,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:26,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:26,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252855358] [2021-05-06 08:21:26,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:26,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:26,889 INFO L87 Difference]: Start difference. First operand 2098 states and 2860 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:27,164 INFO L93 Difference]: Finished difference Result 2506 states and 3367 transitions. [2021-05-06 08:21:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:21:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-06 08:21:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:27,169 INFO L225 Difference]: With dead ends: 2506 [2021-05-06 08:21:27,169 INFO L226 Difference]: Without dead ends: 2506 [2021-05-06 08:21:27,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:21:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-05-06 08:21:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2373. [2021-05-06 08:21:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 1538 states have (on average 1.2451235370611184) internal successors, (1915), 1571 states have internal predecessors, (1915), 660 states have call successors, (660), 175 states have call predecessors, (660), 174 states have return successors, (654), 626 states have call predecessors, (654), 654 states have call successors, (654) [2021-05-06 08:21:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3229 transitions. [2021-05-06 08:21:27,201 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3229 transitions. Word has length 104 [2021-05-06 08:21:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:27,201 INFO L480 AbstractCegarLoop]: Abstraction has 2373 states and 3229 transitions. [2021-05-06 08:21:27,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3229 transitions. [2021-05-06 08:21:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:21:27,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:27,202 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:27,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:21:27,417 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 4 times [2021-05-06 08:21:27,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:27,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646980749] [2021-05-06 08:21:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:27,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:27,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779470875] [2021-05-06 08:21:27,421 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:27,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:21:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:27,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 72 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 08:21:27,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:27,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646980749] [2021-05-06 08:21:27,974 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:27,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779470875] [2021-05-06 08:21:27,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779470875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:27,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:27,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:21:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985561010] [2021-05-06 08:21:27,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:21:27,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:21:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:21:27,975 INFO L87 Difference]: Start difference. First operand 2373 states and 3229 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:28,579 INFO L93 Difference]: Finished difference Result 2361 states and 3206 transitions. [2021-05-06 08:21:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:21:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2021-05-06 08:21:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:28,595 INFO L225 Difference]: With dead ends: 2361 [2021-05-06 08:21:28,595 INFO L226 Difference]: Without dead ends: 2356 [2021-05-06 08:21:28,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:21:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-06 08:21:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2345. [2021-05-06 08:21:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1524 states have (on average 1.246719160104987) internal successors, (1900), 1558 states have internal predecessors, (1900), 647 states have call successors, (647), 174 states have call predecessors, (647), 173 states have return successors, (642), 612 states have call predecessors, (642), 642 states have call successors, (642) [2021-05-06 08:21:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3189 transitions. [2021-05-06 08:21:28,647 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3189 transitions. Word has length 108 [2021-05-06 08:21:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:28,647 INFO L480 AbstractCegarLoop]: Abstraction has 2345 states and 3189 transitions. [2021-05-06 08:21:28,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3189 transitions. [2021-05-06 08:21:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:21:28,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:28,649 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:28,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 08:21:28,865 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1065259357, now seen corresponding path program 5 times [2021-05-06 08:21:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:28,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541249138] [2021-05-06 08:21:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:28,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:28,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352727481] [2021-05-06 08:21:28,870 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:28,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:21:28,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:21:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:29,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:29,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,124 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-06 08:21:30,399 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-06 08:21:30,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:30,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 71 proven. 89 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:21:31,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:31,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541249138] [2021-05-06 08:21:31,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:31,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352727481] [2021-05-06 08:21:31,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352727481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:31,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:31,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:21:31,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703179556] [2021-05-06 08:21:31,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:21:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:31,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:21:31,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:21:31,679 INFO L87 Difference]: Start difference. First operand 2345 states and 3189 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:21:34,773 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-06 08:21:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:36,833 INFO L93 Difference]: Finished difference Result 2491 states and 3385 transitions. [2021-05-06 08:21:36,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 111 [2021-05-06 08:21:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:36,838 INFO L225 Difference]: With dead ends: 2491 [2021-05-06 08:21:36,838 INFO L226 Difference]: Without dead ends: 2490 [2021-05-06 08:21:36,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2749.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-06 08:21:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2385. [2021-05-06 08:21:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 1553 states have (on average 1.2421120412105602) internal successors, (1929), 1588 states have internal predecessors, (1929), 649 states have call successors, (649), 183 states have call predecessors, (649), 182 states have return successors, (644), 613 states have call predecessors, (644), 644 states have call successors, (644) [2021-05-06 08:21:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3222 transitions. [2021-05-06 08:21:36,875 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3222 transitions. Word has length 111 [2021-05-06 08:21:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:36,876 INFO L480 AbstractCegarLoop]: Abstraction has 2385 states and 3222 transitions. [2021-05-06 08:21:36,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:21:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3222 transitions. [2021-05-06 08:21:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 08:21:36,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:36,878 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:37,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:21:37,085 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1419687748, now seen corresponding path program 5 times [2021-05-06 08:21:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:37,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876928518] [2021-05-06 08:21:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:37,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:37,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118279924] [2021-05-06 08:21:37,090 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:37,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:21:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-06 08:21:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:37,786 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:21:37,913 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-06 08:21:38,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 32 proven. 92 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-06 08:21:38,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:38,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876928518] [2021-05-06 08:21:38,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:38,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118279924] [2021-05-06 08:21:38,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118279924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:38,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:38,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:38,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423657452] [2021-05-06 08:21:38,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:38,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:38,109 INFO L87 Difference]: Start difference. First operand 2385 states and 3222 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:21:38,898 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-06 08:21:39,194 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-06 08:21:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:39,448 INFO L93 Difference]: Finished difference Result 2551 states and 3450 transitions. [2021-05-06 08:21:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 109 [2021-05-06 08:21:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:39,453 INFO L225 Difference]: With dead ends: 2551 [2021-05-06 08:21:39,453 INFO L226 Difference]: Without dead ends: 2551 [2021-05-06 08:21:39,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1258.3ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:21:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-06 08:21:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2494. [2021-05-06 08:21:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1621 states have (on average 1.2449105490438002) internal successors, (2018), 1659 states have internal predecessors, (2018), 683 states have call successors, (683), 190 states have call predecessors, (683), 189 states have return successors, (678), 644 states have call predecessors, (678), 678 states have call successors, (678) [2021-05-06 08:21:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3379 transitions. [2021-05-06 08:21:39,485 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3379 transitions. Word has length 109 [2021-05-06 08:21:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:39,485 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 3379 transitions. [2021-05-06 08:21:39,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:21:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3379 transitions. [2021-05-06 08:21:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 08:21:39,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:39,487 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:39,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:39,692 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1489781889, now seen corresponding path program 5 times [2021-05-06 08:21:39,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:39,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021249987] [2021-05-06 08:21:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:39,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:39,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110604991] [2021-05-06 08:21:39,698 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:39,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:21:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:39,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:21:39,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:39,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:39,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:21:40,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:40,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021249987] [2021-05-06 08:21:40,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:40,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110604991] [2021-05-06 08:21:40,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110604991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:40,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:40,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4459781] [2021-05-06 08:21:40,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:40,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:40,080 INFO L87 Difference]: Start difference. First operand 2494 states and 3379 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:40,423 INFO L93 Difference]: Finished difference Result 3065 states and 4075 transitions. [2021-05-06 08:21:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:21:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2021-05-06 08:21:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:40,428 INFO L225 Difference]: With dead ends: 3065 [2021-05-06 08:21:40,428 INFO L226 Difference]: Without dead ends: 3065 [2021-05-06 08:21:40,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-05-06 08:21:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2949. [2021-05-06 08:21:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 1946 states have (on average 1.2204522096608428) internal successors, (2375), 1984 states have internal predecessors, (2375), 782 states have call successors, (782), 221 states have call predecessors, (782), 220 states have return successors, (776), 743 states have call predecessors, (776), 776 states have call successors, (776) [2021-05-06 08:21:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3933 transitions. [2021-05-06 08:21:40,467 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3933 transitions. Word has length 110 [2021-05-06 08:21:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:40,467 INFO L480 AbstractCegarLoop]: Abstraction has 2949 states and 3933 transitions. [2021-05-06 08:21:40,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:21:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3933 transitions. [2021-05-06 08:21:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:21:40,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:40,469 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:40,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-06 08:21:40,686 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash 989476300, now seen corresponding path program 6 times [2021-05-06 08:21:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:40,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615548353] [2021-05-06 08:21:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:40,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835666537] [2021-05-06 08:21:40,692 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:40,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 08:21:40,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 08:21:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:40,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 77 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 08:21:41,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:41,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615548353] [2021-05-06 08:21:41,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:41,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835666537] [2021-05-06 08:21:41,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835666537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:41,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:41,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:41,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302037651] [2021-05-06 08:21:41,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:41,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:41,395 INFO L87 Difference]: Start difference. First operand 2949 states and 3933 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:42,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:42,093 INFO L93 Difference]: Finished difference Result 3033 states and 4055 transitions. [2021-05-06 08:21:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:21:42,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 115 [2021-05-06 08:21:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:42,098 INFO L225 Difference]: With dead ends: 3033 [2021-05-06 08:21:42,098 INFO L226 Difference]: Without dead ends: 3028 [2021-05-06 08:21:42,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 512.6ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-06 08:21:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3005. [2021-05-06 08:21:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 1977 states have (on average 1.2230652503793626) internal successors, (2418), 2016 states have internal predecessors, (2418), 806 states have call successors, (806), 222 states have call predecessors, (806), 221 states have return successors, (800), 766 states have call predecessors, (800), 800 states have call successors, (800) [2021-05-06 08:21:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4024 transitions. [2021-05-06 08:21:42,147 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4024 transitions. Word has length 115 [2021-05-06 08:21:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:42,147 INFO L480 AbstractCegarLoop]: Abstraction has 3005 states and 4024 transitions. [2021-05-06 08:21:42,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4024 transitions. [2021-05-06 08:21:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:21:42,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:42,149 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:42,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-06 08:21:42,365 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1356735190, now seen corresponding path program 7 times [2021-05-06 08:21:42,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:42,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529759596] [2021-05-06 08:21:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:42,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:42,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752198181] [2021-05-06 08:21:42,370 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:42,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-06 08:21:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:21:42,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:42,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529759596] [2021-05-06 08:21:42,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:42,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752198181] [2021-05-06 08:21:42,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752198181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:42,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:42,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:21:42,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903609240] [2021-05-06 08:21:42,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:21:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:21:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:21:42,870 INFO L87 Difference]: Start difference. First operand 3005 states and 4024 transitions. Second operand has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:21:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:43,665 INFO L93 Difference]: Finished difference Result 3144 states and 4209 transitions. [2021-05-06 08:21:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2021-05-06 08:21:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:43,670 INFO L225 Difference]: With dead ends: 3144 [2021-05-06 08:21:43,671 INFO L226 Difference]: Without dead ends: 3143 [2021-05-06 08:21:43,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:21:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-05-06 08:21:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 3059. [2021-05-06 08:21:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 2016 states have (on average 1.2197420634920635) internal successors, (2459), 2056 states have internal predecessors, (2459), 812 states have call successors, (812), 231 states have call predecessors, (812), 230 states have return successors, (806), 771 states have call predecessors, (806), 806 states have call successors, (806) [2021-05-06 08:21:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4077 transitions. [2021-05-06 08:21:43,709 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4077 transitions. Word has length 115 [2021-05-06 08:21:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:43,709 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 4077 transitions. [2021-05-06 08:21:43,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:21:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4077 transitions. [2021-05-06 08:21:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 08:21:43,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:43,710 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 08:21:43,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:43,913 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash 660396276, now seen corresponding path program 2 times [2021-05-06 08:21:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287036747] [2021-05-06 08:21:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:43,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:43,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795323968] [2021-05-06 08:21:43,918 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:43,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:43,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:21:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-05-06 08:21:44,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:44,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287036747] [2021-05-06 08:21:44,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:44,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795323968] [2021-05-06 08:21:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795323968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:44,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:44,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:21:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302442437] [2021-05-06 08:21:44,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:21:44,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:21:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:21:44,200 INFO L87 Difference]: Start difference. First operand 3059 states and 4077 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:21:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:44,988 INFO L93 Difference]: Finished difference Result 3571 states and 4894 transitions. [2021-05-06 08:21:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 08:21:44,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 120 [2021-05-06 08:21:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:44,995 INFO L225 Difference]: With dead ends: 3571 [2021-05-06 08:21:44,995 INFO L226 Difference]: Without dead ends: 3571 [2021-05-06 08:21:44,995 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 08:21:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2021-05-06 08:21:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3100. [2021-05-06 08:21:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.219607843137255) internal successors, (2488), 2080 states have internal predecessors, (2488), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 08:21:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4130 transitions. [2021-05-06 08:21:45,038 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4130 transitions. Word has length 120 [2021-05-06 08:21:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:45,039 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4130 transitions. [2021-05-06 08:21:45,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:21:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4130 transitions. [2021-05-06 08:21:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 08:21:45,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,040 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:45,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-06 08:21:45,257 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash -347512269, now seen corresponding path program 2 times [2021-05-06 08:21:45,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:45,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705977850] [2021-05-06 08:21:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:45,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:45,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566259061] [2021-05-06 08:21:45,263 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:45,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:45,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:21:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:45,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:21:45,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:45,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705977850] [2021-05-06 08:21:45,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:45,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566259061] [2021-05-06 08:21:45,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566259061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:45,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:45,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:21:45,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989344390] [2021-05-06 08:21:45,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:21:45,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:21:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:21:45,556 INFO L87 Difference]: Start difference. First operand 3100 states and 4130 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:45,830 INFO L93 Difference]: Finished difference Result 3106 states and 4128 transitions. [2021-05-06 08:21:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:21:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2021-05-06 08:21:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:45,835 INFO L225 Difference]: With dead ends: 3106 [2021-05-06 08:21:45,835 INFO L226 Difference]: Without dead ends: 3106 [2021-05-06 08:21:45,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:21:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-05-06 08:21:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 3100. [2021-05-06 08:21:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.217156862745098) internal successors, (2483), 2080 states have internal predecessors, (2483), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 08:21:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4125 transitions. [2021-05-06 08:21:45,876 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4125 transitions. Word has length 121 [2021-05-06 08:21:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:45,876 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4125 transitions. [2021-05-06 08:21:45,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4125 transitions. [2021-05-06 08:21:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:21:45,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:45,878 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:46,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:46,095 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2145145311, now seen corresponding path program 8 times [2021-05-06 08:21:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:46,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958119150] [2021-05-06 08:21:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:46,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:46,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413374580] [2021-05-06 08:21:46,100 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:46,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 08:21:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:46,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 08:21:46,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958119150] [2021-05-06 08:21:46,641 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413374580] [2021-05-06 08:21:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413374580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:46,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:46,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899126971] [2021-05-06 08:21:46,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:46,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:46,642 INFO L87 Difference]: Start difference. First operand 3100 states and 4125 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:47,681 INFO L93 Difference]: Finished difference Result 3260 states and 4355 transitions. [2021-05-06 08:21:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:21:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 122 [2021-05-06 08:21:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:47,686 INFO L225 Difference]: With dead ends: 3260 [2021-05-06 08:21:47,686 INFO L226 Difference]: Without dead ends: 3259 [2021-05-06 08:21:47,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:21:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-05-06 08:21:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 3223. [2021-05-06 08:21:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2110 states have (on average 1.2222748815165876) internal successors, (2579), 2154 states have internal predecessors, (2579), 870 states have call successors, (870), 243 states have call predecessors, (870), 242 states have return successors, (864), 825 states have call predecessors, (864), 864 states have call successors, (864) [2021-05-06 08:21:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4313 transitions. [2021-05-06 08:21:47,727 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4313 transitions. Word has length 122 [2021-05-06 08:21:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:47,727 INFO L480 AbstractCegarLoop]: Abstraction has 3223 states and 4313 transitions. [2021-05-06 08:21:47,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4313 transitions. [2021-05-06 08:21:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 08:21:47,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:47,729 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:47,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-05-06 08:21:47,945 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -510906365, now seen corresponding path program 1 times [2021-05-06 08:21:47,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:47,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439119291] [2021-05-06 08:21:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:47,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:47,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221348105] [2021-05-06 08:21:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:21:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 08:21:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:48,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 96 proven. 124 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 08:21:48,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:48,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439119291] [2021-05-06 08:21:48,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:48,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221348105] [2021-05-06 08:21:48,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221348105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:48,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:48,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:21:48,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794253952] [2021-05-06 08:21:48,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:21:48,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:48,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:21:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:21:48,734 INFO L87 Difference]: Start difference. First operand 3223 states and 4313 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:21:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:49,507 INFO L93 Difference]: Finished difference Result 3395 states and 4557 transitions. [2021-05-06 08:21:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:21:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 125 [2021-05-06 08:21:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:49,526 INFO L225 Difference]: With dead ends: 3395 [2021-05-06 08:21:49,526 INFO L226 Difference]: Without dead ends: 3395 [2021-05-06 08:21:49,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:21:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-06 08:21:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3290. [2021-05-06 08:21:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 2150 states have (on average 1.2241860465116279) internal successors, (2632), 2194 states have internal predecessors, (2632), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:21:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4406 transitions. [2021-05-06 08:21:49,588 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4406 transitions. Word has length 125 [2021-05-06 08:21:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:49,588 INFO L480 AbstractCegarLoop]: Abstraction has 3290 states and 4406 transitions. [2021-05-06 08:21:49,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:21:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4406 transitions. [2021-05-06 08:21:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 08:21:49,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:49,591 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 08:21:49,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-06 08:21:49,808 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:49,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2946020, now seen corresponding path program 4 times [2021-05-06 08:21:49,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:49,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946515209] [2021-05-06 08:21:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:49,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:49,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538487736] [2021-05-06 08:21:49,813 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:49,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:21:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:21:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:49,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:21:50,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:50,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946515209] [2021-05-06 08:21:50,155 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:50,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538487736] [2021-05-06 08:21:50,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538487736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:50,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:50,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373593612] [2021-05-06 08:21:50,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:50,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:50,156 INFO L87 Difference]: Start difference. First operand 3290 states and 4406 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:50,539 INFO L93 Difference]: Finished difference Result 3354 states and 4466 transitions. [2021-05-06 08:21:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:21:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2021-05-06 08:21:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:50,544 INFO L225 Difference]: With dead ends: 3354 [2021-05-06 08:21:50,544 INFO L226 Difference]: Without dead ends: 3354 [2021-05-06 08:21:50,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-05-06 08:21:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3299. [2021-05-06 08:21:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2159 states have (on average 1.22325150532654) internal successors, (2641), 2203 states have internal predecessors, (2641), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:21:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4415 transitions. [2021-05-06 08:21:50,589 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4415 transitions. Word has length 125 [2021-05-06 08:21:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:50,589 INFO L480 AbstractCegarLoop]: Abstraction has 3299 states and 4415 transitions. [2021-05-06 08:21:50,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4415 transitions. [2021-05-06 08:21:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:21:50,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:50,591 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:50,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-06 08:21:50,805 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1377829051, now seen corresponding path program 2 times [2021-05-06 08:21:50,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:50,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492749756] [2021-05-06 08:21:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:50,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:50,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318921198] [2021-05-06 08:21:50,809 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:50,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:21:50,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:50,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:21:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:21:51,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:51,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492749756] [2021-05-06 08:21:51,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:51,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318921198] [2021-05-06 08:21:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318921198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:51,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:51,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:21:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484296341] [2021-05-06 08:21:51,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:21:51,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:21:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:21:51,146 INFO L87 Difference]: Start difference. First operand 3299 states and 4415 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:21:51,438 INFO L93 Difference]: Finished difference Result 3374 states and 4485 transitions. [2021-05-06 08:21:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:21:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2021-05-06 08:21:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:21:51,442 INFO L225 Difference]: With dead ends: 3374 [2021-05-06 08:21:51,443 INFO L226 Difference]: Without dead ends: 3374 [2021-05-06 08:21:51,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:21:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-05-06 08:21:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3354. [2021-05-06 08:21:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 2214 states have (on average 1.2168021680216803) internal successors, (2694), 2258 states have internal predecessors, (2694), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:21:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4468 transitions. [2021-05-06 08:21:51,482 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4468 transitions. Word has length 127 [2021-05-06 08:21:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:21:51,483 INFO L480 AbstractCegarLoop]: Abstraction has 3354 states and 4468 transitions. [2021-05-06 08:21:51,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:21:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4468 transitions. [2021-05-06 08:21:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 08:21:51,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:51,485 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:51,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-06 08:21:51,701 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:51,702 INFO L82 PathProgramCache]: Analyzing trace with hash 95675211, now seen corresponding path program 9 times [2021-05-06 08:21:51,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:51,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38602699] [2021-05-06 08:21:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:51,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:21:51,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315037891] [2021-05-06 08:21:51,706 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:21:51,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:21:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:21:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-06 08:21:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:21:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,614 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-06 08:21:52,838 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-06 08:21:52,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 119 proven. 45 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-05-06 08:21:52,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:21:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38602699] [2021-05-06 08:21:52,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:21:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315037891] [2021-05-06 08:21:52,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315037891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:21:52,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:21:52,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:21:52,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848386405] [2021-05-06 08:21:52,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:21:52,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:21:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:21:52,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:21:52,924 INFO L87 Difference]: Start difference. First operand 3354 states and 4468 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:21:55,820 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-05-06 08:22:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:07,926 INFO L93 Difference]: Finished difference Result 3650 states and 4867 transitions. [2021-05-06 08:22:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 131 [2021-05-06 08:22:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:07,932 INFO L225 Difference]: With dead ends: 3650 [2021-05-06 08:22:07,932 INFO L226 Difference]: Without dead ends: 3629 [2021-05-06 08:22:07,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2716.1ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:22:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-05-06 08:22:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3589. [2021-05-06 08:22:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 2368 states have (on average 1.2204391891891893) internal successors, (2890), 2416 states have internal predecessors, (2890), 959 states have call successors, (959), 262 states have call predecessors, (959), 261 states have return successors, (954), 910 states have call predecessors, (954), 954 states have call successors, (954) [2021-05-06 08:22:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 4803 transitions. [2021-05-06 08:22:08,004 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 4803 transitions. Word has length 131 [2021-05-06 08:22:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:08,005 INFO L480 AbstractCegarLoop]: Abstraction has 3589 states and 4803 transitions. [2021-05-06 08:22:08,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:22:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 4803 transitions. [2021-05-06 08:22:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 08:22:08,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:08,006 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:08,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,224 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:08,224 INFO L82 PathProgramCache]: Analyzing trace with hash -767499375, now seen corresponding path program 10 times [2021-05-06 08:22:08,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:08,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432581058] [2021-05-06 08:22:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:08,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:08,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401120589] [2021-05-06 08:22:08,228 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:08,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:22:08,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,718 WARN L159 QuantifierPusher]: Ignoring assumption.