/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/cohencu-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:12:37,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:12:37,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:12:37,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:12:37,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:12:37,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:12:37,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:12:37,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:12:37,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:12:37,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:12:37,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:12:37,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:12:37,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:12:37,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:12:37,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:12:37,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:12:37,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:12:37,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:12:37,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:12:37,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:12:37,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:12:37,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:12:37,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:12:37,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:12:37,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:12:37,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:12:37,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:12:37,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:12:37,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:12:37,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:12:37,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:12:37,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:12:37,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:12:37,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:12:37,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:12:37,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:12:37,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:12:37,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:12:37,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:12:37,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:12:37,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:12:37,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:12:37,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:12:37,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:12:37,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:12:37,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:12:37,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:12:37,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:12:37,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:12:37,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:12:37,382 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:12:37,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:12:37,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:12:37,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:12:37,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:12:37,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:12:37,729 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:12:37,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2021-05-06 07:12:37,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cbc1933/60ec6e69cadb455ca92f96687b03fe04/FLAG38ebdd856 [2021-05-06 07:12:38,301 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:12:38,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2021-05-06 07:12:38,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cbc1933/60ec6e69cadb455ca92f96687b03fe04/FLAG38ebdd856 [2021-05-06 07:12:38,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cbc1933/60ec6e69cadb455ca92f96687b03fe04 [2021-05-06 07:12:38,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:12:38,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:12:38,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:12:38,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:12:38,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:12:38,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:38,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fe48dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38, skipping insertion in model container [2021-05-06 07:12:38,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:38,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:12:38,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:12:38,878 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/cohencu-ll_unwindbound5.c[596,609] [2021-05-06 07:12:38,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:12:38,903 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:12:38,958 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/cohencu-ll_unwindbound5.c[596,609] [2021-05-06 07:12:38,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:12:38,983 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:12:38,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38 WrapperNode [2021-05-06 07:12:38,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:12:38,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:12:38,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:12:38,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:12:38,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:38,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:39,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:39,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:39,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:39,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:39,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... [2021-05-06 07:12:39,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:12:39,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:12:39,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:12:39,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:12:39,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:12:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:12:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:12:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:12:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:12:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:12:39,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:12:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:12:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:12:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:12:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:12:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:12:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:12:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:12:39,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:12:39,346 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:12:39,347 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:12:39,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:12:39 BoogieIcfgContainer [2021-05-06 07:12:39,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:12:39,349 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:12:39,349 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:12:39,350 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:12:39,352 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:12:39" (1/1) ... [2021-05-06 07:12:39,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:12:39 BasicIcfg [2021-05-06 07:12:39,365 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:12:39,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:12:39,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:12:39,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:12:39,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:12:38" (1/4) ... [2021-05-06 07:12:39,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386c0d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:12:39, skipping insertion in model container [2021-05-06 07:12:39,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:12:38" (2/4) ... [2021-05-06 07:12:39,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386c0d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:12:39, skipping insertion in model container [2021-05-06 07:12:39,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:12:39" (3/4) ... [2021-05-06 07:12:39,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386c0d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:12:39, skipping insertion in model container [2021-05-06 07:12:39,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:12:39" (4/4) ... [2021-05-06 07:12:39,372 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.cJordan [2021-05-06 07:12:39,377 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:12:39,380 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:12:39,394 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:12:39,410 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:12:39,411 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:12:39,411 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:12:39,411 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:12:39,411 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:12:39,411 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:12:39,411 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:12:39,411 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:12:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:12:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 07:12:39,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:39,428 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:39,429 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2021-05-06 07:12:39,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:39,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225797971] [2021-05-06 07:12:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:39,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:12:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:39,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:39,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225797971] [2021-05-06 07:12:39,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225797971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:39,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:39,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:12:39,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794952753] [2021-05-06 07:12:39,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:12:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:12:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:12:39,771 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:12:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:39,929 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-05-06 07:12:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:12:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 07:12:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:39,947 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:12:39,947 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:12:39,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:12:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:12:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 07:12:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:12:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-06 07:12:39,979 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-06 07:12:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:39,980 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-06 07:12:39,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:12:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-06 07:12:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:12:39,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:39,981 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:39,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:12:39,981 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:39,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2021-05-06 07:12:39,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:39,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939044858] [2021-05-06 07:12:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:40,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:12:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:40,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:40,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939044858] [2021-05-06 07:12:40,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939044858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:40,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:40,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:12:40,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165442348] [2021-05-06 07:12:40,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:40,115 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:12:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:40,235 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-05-06 07:12:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:12:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:40,237 INFO L225 Difference]: With dead ends: 28 [2021-05-06 07:12:40,237 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 07:12:40,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 07:12:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 07:12:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:12:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-06 07:12:40,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-06 07:12:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:40,245 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-06 07:12:40,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:12:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-06 07:12:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:12:40,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:40,245 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:40,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:12:40,246 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:40,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2021-05-06 07:12:40,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:40,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149387640] [2021-05-06 07:12:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:12:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:40,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:40,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149387640] [2021-05-06 07:12:40,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149387640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:40,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:40,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:12:40,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921778255] [2021-05-06 07:12:40,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:40,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:40,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:40,343 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:12:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:40,574 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-06 07:12:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:12:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:40,576 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:12:40,576 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 07:12:40,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 07:12:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 07:12:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:12:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 07:12:40,590 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 07:12:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:40,591 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 07:12:40,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:12:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 07:12:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:12:40,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:40,593 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:40,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 07:12:40,594 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2021-05-06 07:12:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:40,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941898581] [2021-05-06 07:12:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:40,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:40,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139549462] [2021-05-06 07:12:40,620 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 07:12:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:40,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:12:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:40,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:12:40,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941898581] [2021-05-06 07:12:40,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139549462] [2021-05-06 07:12:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139549462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:40,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:40,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:12:40,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605165174] [2021-05-06 07:12:40,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:40,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:40,827 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:12:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:40,899 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2021-05-06 07:12:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:12:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 07:12:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:40,902 INFO L225 Difference]: With dead ends: 48 [2021-05-06 07:12:40,902 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 07:12:40,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 07:12:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-05-06 07:12:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:12:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-05-06 07:12:40,909 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2021-05-06 07:12:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:40,909 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-05-06 07:12:40,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:12:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-05-06 07:12:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:12:40,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:40,910 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:41,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:41,136 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2021-05-06 07:12:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:41,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755049183] [2021-05-06 07:12:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:41,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:41,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305827946] [2021-05-06 07:12:41,148 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 07:12:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:41,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:12:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:41,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:41,382 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 07:12:41,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755049183] [2021-05-06 07:12:41,383 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:41,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305827946] [2021-05-06 07:12:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305827946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:41,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:41,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:12:41,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031883451] [2021-05-06 07:12:41,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:41,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:41,385 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:12:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:41,458 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-06 07:12:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:12:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 07:12:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:41,461 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:12:41,462 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:12:41,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:12:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-05-06 07:12:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 07:12:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-05-06 07:12:41,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2021-05-06 07:12:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:41,470 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-05-06 07:12:41,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:12:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-05-06 07:12:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:12:41,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:41,471 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:41,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:41,672 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2021-05-06 07:12:41,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:41,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014614484] [2021-05-06 07:12:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:41,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:41,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461868865] [2021-05-06 07:12:41,682 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 07:12:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:12:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:41,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:12:41,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014614484] [2021-05-06 07:12:41,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461868865] [2021-05-06 07:12:41,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461868865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:12:41,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:12:41,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:12:41,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081976746] [2021-05-06 07:12:41,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:41,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:41,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:41,832 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:12:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:41,922 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-06 07:12:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:12:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 07:12:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:41,923 INFO L225 Difference]: With dead ends: 60 [2021-05-06 07:12:41,923 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 07:12:41,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 07:12:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 07:12:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:12:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-05-06 07:12:41,930 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2021-05-06 07:12:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:41,930 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-05-06 07:12:41,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:12:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-05-06 07:12:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 07:12:41,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:41,931 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:42,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:42,153 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2021-05-06 07:12:42,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:42,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152003542] [2021-05-06 07:12:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:42,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:42,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743252564] [2021-05-06 07:12:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:12:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:42,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:12:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:42,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-06 07:12:42,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152003542] [2021-05-06 07:12:42,364 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743252564] [2021-05-06 07:12:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743252564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:42,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:42,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:12:42,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139976639] [2021-05-06 07:12:42,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:12:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:12:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:12:42,365 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 07:12:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:42,417 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-05-06 07:12:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:42,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 07:12:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:42,421 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:12:42,421 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 07:12:42,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 07:12:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 07:12:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:12:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-05-06 07:12:42,438 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2021-05-06 07:12:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:42,438 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-05-06 07:12:42,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 07:12:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-05-06 07:12:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 07:12:42,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:42,439 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:42,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:42,640 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2021-05-06 07:12:42,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:42,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035111036] [2021-05-06 07:12:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:42,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888208606] [2021-05-06 07:12:42,654 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 07:12:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:12:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:12:42,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:42,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035111036] [2021-05-06 07:12:42,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:42,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888208606] [2021-05-06 07:12:42,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888208606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:42,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:42,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:42,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413023453] [2021-05-06 07:12:42,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:42,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:42,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:42,886 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 07:12:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:42,995 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-05-06 07:12:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 07:12:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:42,996 INFO L225 Difference]: With dead ends: 76 [2021-05-06 07:12:42,996 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 07:12:42,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 07:12:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-06 07:12:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 07:12:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-05-06 07:12:43,012 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 45 [2021-05-06 07:12:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:43,012 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-05-06 07:12:43,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 07:12:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-05-06 07:12:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:12:43,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:43,013 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:43,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:43,214 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2021-05-06 07:12:43,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:43,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415019678] [2021-05-06 07:12:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:43,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:43,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232343919] [2021-05-06 07:12:43,224 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 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 07:12:43,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:43,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:12:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:43,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 07:12:43,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415019678] [2021-05-06 07:12:43,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232343919] [2021-05-06 07:12:43,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232343919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:43,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:43,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:43,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487201179] [2021-05-06 07:12:43,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:43,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:43,417 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 07:12:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:43,522 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-05-06 07:12:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 50 [2021-05-06 07:12:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:43,527 INFO L225 Difference]: With dead ends: 80 [2021-05-06 07:12:43,528 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 07:12:43,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 07:12:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2021-05-06 07:12:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 41 states have internal predecessors, (42), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 07:12:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-05-06 07:12:43,559 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 50 [2021-05-06 07:12:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:43,559 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-05-06 07:12:43,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 07:12:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-05-06 07:12:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 07:12:43,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:43,563 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:43,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:43,771 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash -895540175, now seen corresponding path program 3 times [2021-05-06 07:12:43,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:43,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204036456] [2021-05-06 07:12:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:43,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:43,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024646355] [2021-05-06 07:12:43,787 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 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 07:12:43,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:12:43,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:12:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:43,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:43,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:43,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 07:12:44,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204036456] [2021-05-06 07:12:44,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024646355] [2021-05-06 07:12:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024646355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:44,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:44,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86499939] [2021-05-06 07:12:44,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:44,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:44,024 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 07:12:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:44,116 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2021-05-06 07:12:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 55 [2021-05-06 07:12:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:44,118 INFO L225 Difference]: With dead ends: 84 [2021-05-06 07:12:44,118 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 07:12:44,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 07:12:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 07:12:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:12:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-05-06 07:12:44,123 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 55 [2021-05-06 07:12:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:44,124 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-05-06 07:12:44,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 07:12:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-05-06 07:12:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 07:12:44,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:44,125 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:44,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 07:12:44,350 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash 31793531, now seen corresponding path program 4 times [2021-05-06 07:12:44,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:44,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840272627] [2021-05-06 07:12:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:44,360 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:44,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494706760] [2021-05-06 07:12:44,361 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 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 07:12:44,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:12:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:12:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 07:12:44,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:44,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840272627] [2021-05-06 07:12:44,568 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:44,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494706760] [2021-05-06 07:12:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494706760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:44,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:44,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:44,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280780051] [2021-05-06 07:12:44,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:44,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:44,570 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 07:12:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:44,651 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-05-06 07:12:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:12:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-06 07:12:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:44,656 INFO L225 Difference]: With dead ends: 87 [2021-05-06 07:12:44,656 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:12:44,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:12:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:12:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:12:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2021-05-06 07:12:44,666 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 60 [2021-05-06 07:12:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:44,667 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2021-05-06 07:12:44,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 07:12:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2021-05-06 07:12:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 07:12:44,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:44,670 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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 07:12:44,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 07:12:44,873 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2021-05-06 07:12:44,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:44,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862850192] [2021-05-06 07:12:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:44,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:44,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262347196] [2021-05-06 07:12:44,881 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 07:12:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 07:12:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 07:12:45,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:45,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862850192] [2021-05-06 07:12:45,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:45,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262347196] [2021-05-06 07:12:45,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262347196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:45,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:45,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:45,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106142337] [2021-05-06 07:12:45,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:45,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:45,419 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:12:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:45,552 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-05-06 07:12:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-05-06 07:12:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:45,553 INFO L225 Difference]: With dead ends: 90 [2021-05-06 07:12:45,553 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 07:12:45,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 07:12:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-06 07:12:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:12:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2021-05-06 07:12:45,558 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 71 [2021-05-06 07:12:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:45,559 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2021-05-06 07:12:45,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:12:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2021-05-06 07:12:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 07:12:45,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:45,560 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-06 07:12:45,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:45,777 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2021-05-06 07:12:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:45,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342451058] [2021-05-06 07:12:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:45,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:45,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196376689] [2021-05-06 07:12:45,797 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 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 07:12:45,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:12:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:45,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:45,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 60 proven. 112 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-06 07:12:46,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:46,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342451058] [2021-05-06 07:12:46,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:46,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196376689] [2021-05-06 07:12:46,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196376689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:46,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:46,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:12:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445633937] [2021-05-06 07:12:46,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:12:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:12:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:12:46,027 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:12:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:46,103 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-05-06 07:12:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-06 07:12:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:46,105 INFO L225 Difference]: With dead ends: 102 [2021-05-06 07:12:46,105 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 07:12:46,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 07:12:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-06 07:12:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 27 states have call successors, (27), 16 states have call predecessors, (27), 15 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:12:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2021-05-06 07:12:46,110 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 73 [2021-05-06 07:12:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:46,110 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2021-05-06 07:12:46,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:12:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2021-05-06 07:12:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 07:12:46,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:46,111 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:46,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:46,337 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2049786824, now seen corresponding path program 5 times [2021-05-06 07:12:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:46,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985541622] [2021-05-06 07:12:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:46,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:46,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550732095] [2021-05-06 07:12:46,345 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 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 07:12:46,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 07:12:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:12:46,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:46,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 07:12:46,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:46,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985541622] [2021-05-06 07:12:46,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:46,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550732095] [2021-05-06 07:12:46,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550732095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:46,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:46,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597434964] [2021-05-06 07:12:46,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:46,741 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:12:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:46,889 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2021-05-06 07:12:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-06 07:12:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:46,891 INFO L225 Difference]: With dead ends: 116 [2021-05-06 07:12:46,891 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 07:12:46,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 07:12:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2021-05-06 07:12:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:12:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2021-05-06 07:12:46,896 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 73 [2021-05-06 07:12:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:46,897 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2021-05-06 07:12:46,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:12:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2021-05-06 07:12:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 07:12:46,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:46,898 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 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 07:12:47,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 07:12:47,104 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2021-05-06 07:12:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:47,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040059477] [2021-05-06 07:12:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:47,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:47,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214791122] [2021-05-06 07:12:47,112 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 07:12:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:12:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:47,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 07:12:47,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:47,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040059477] [2021-05-06 07:12:47,438 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:47,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214791122] [2021-05-06 07:12:47,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214791122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:47,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:47,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:47,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712012326] [2021-05-06 07:12:47,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:47,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:47,439 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:12:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:47,538 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-05-06 07:12:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2021-05-06 07:12:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:47,541 INFO L225 Difference]: With dead ends: 110 [2021-05-06 07:12:47,541 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:12:47,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:12:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-06 07:12:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 29 states have call successors, (29), 18 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:12:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2021-05-06 07:12:47,546 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 76 [2021-05-06 07:12:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:47,546 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2021-05-06 07:12:47,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:12:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2021-05-06 07:12:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 07:12:47,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:47,547 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:47,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 07:12:47,762 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 6 times [2021-05-06 07:12:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:47,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975950602] [2021-05-06 07:12:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:47,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:47,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831857280] [2021-05-06 07:12:47,769 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 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 07:12:47,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 07:12:47,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 07:12:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:47,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:47,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-06 07:12:48,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975950602] [2021-05-06 07:12:48,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831857280] [2021-05-06 07:12:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831857280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:12:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235401737] [2021-05-06 07:12:48,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:12:48,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:12:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:48,056 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:12:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:48,851 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2021-05-06 07:12:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:12:48,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2021-05-06 07:12:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:48,852 INFO L225 Difference]: With dead ends: 122 [2021-05-06 07:12:48,852 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:12:48,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:12:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:12:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2021-05-06 07:12:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 59 states have internal predecessors, (60), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:12:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-05-06 07:12:48,857 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 78 [2021-05-06 07:12:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:48,857 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-05-06 07:12:48,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:12:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-05-06 07:12:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 07:12:48,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:48,858 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:49,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-06 07:12:49,070 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:49,070 INFO L82 PathProgramCache]: Analyzing trace with hash 4112183, now seen corresponding path program 7 times [2021-05-06 07:12:49,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:49,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337710952] [2021-05-06 07:12:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:49,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:49,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559891264] [2021-05-06 07:12:49,076 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 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 07:12:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:12:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:12:49,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:49,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 07:12:49,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337710952] [2021-05-06 07:12:49,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559891264] [2021-05-06 07:12:49,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559891264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:49,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:49,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:49,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783429989] [2021-05-06 07:12:49,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:49,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:49,315 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 07:12:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:49,467 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-05-06 07:12:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 83 [2021-05-06 07:12:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:49,468 INFO L225 Difference]: With dead ends: 112 [2021-05-06 07:12:49,468 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 07:12:49,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 07:12:49,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 07:12:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:12:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-05-06 07:12:49,473 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 83 [2021-05-06 07:12:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:49,474 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-05-06 07:12:49,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 07:12:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-05-06 07:12:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 07:12:49,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:49,475 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:49,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:49,697 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:49,697 INFO L82 PathProgramCache]: Analyzing trace with hash 278405480, now seen corresponding path program 2 times [2021-05-06 07:12:49,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:49,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764578064] [2021-05-06 07:12:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:49,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:49,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302036469] [2021-05-06 07:12:49,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:49,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:12:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:49,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 07:12:50,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:50,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764578064] [2021-05-06 07:12:50,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:50,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302036469] [2021-05-06 07:12:50,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302036469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:50,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:50,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:12:50,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895171455] [2021-05-06 07:12:50,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:50,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:50,033 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 07:12:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:50,180 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2021-05-06 07:12:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 99 [2021-05-06 07:12:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:50,182 INFO L225 Difference]: With dead ends: 113 [2021-05-06 07:12:50,182 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 07:12:50,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 07:12:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-06 07:12:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.0625) internal successors, (68), 66 states have internal predecessors, (68), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:12:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-05-06 07:12:50,189 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 99 [2021-05-06 07:12:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:50,191 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-05-06 07:12:50,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 07:12:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-05-06 07:12:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 07:12:50,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:50,192 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:50,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 07:12:50,417 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:50,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1401159909, now seen corresponding path program 3 times [2021-05-06 07:12:50,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:50,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453670934] [2021-05-06 07:12:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:50,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:50,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521568250] [2021-05-06 07:12:50,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:50,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:12:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:12:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:50,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 90 proven. 330 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-05-06 07:12:50,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:50,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453670934] [2021-05-06 07:12:50,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521568250] [2021-05-06 07:12:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521568250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:50,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:50,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:12:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434150424] [2021-05-06 07:12:50,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:12:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:12:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:12:50,741 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 07:12:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:50,847 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2021-05-06 07:12:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:12:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 101 [2021-05-06 07:12:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:50,850 INFO L225 Difference]: With dead ends: 125 [2021-05-06 07:12:50,850 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 07:12:50,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 07:12:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2021-05-06 07:12:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 31 states have call successors, (31), 20 states have call predecessors, (31), 18 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:12:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-05-06 07:12:50,857 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 101 [2021-05-06 07:12:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:50,860 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-05-06 07:12:50,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 07:12:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-05-06 07:12:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 07:12:50,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:50,861 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:51,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:51,067 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:51,068 INFO L82 PathProgramCache]: Analyzing trace with hash 752869822, now seen corresponding path program 8 times [2021-05-06 07:12:51,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:51,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551822862] [2021-05-06 07:12:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:51,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:51,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557226272] [2021-05-06 07:12:51,074 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 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 07:12:51,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:12:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 07:12:51,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:51,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551822862] [2021-05-06 07:12:51,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:51,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557226272] [2021-05-06 07:12:51,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557226272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:51,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:51,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:12:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000798617] [2021-05-06 07:12:51,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:51,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:51,332 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 07:12:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:51,498 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2021-05-06 07:12:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 101 [2021-05-06 07:12:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:51,499 INFO L225 Difference]: With dead ends: 141 [2021-05-06 07:12:51,499 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 07:12:51,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 07:12:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2021-05-06 07:12:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.051948051948052) internal successors, (81), 79 states have internal predecessors, (81), 33 states have call successors, (33), 22 states have call predecessors, (33), 20 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 07:12:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-05-06 07:12:51,504 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 101 [2021-05-06 07:12:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:51,504 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-05-06 07:12:51,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 07:12:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-05-06 07:12:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 07:12:51,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:51,505 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:51,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 07:12:51,725 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash -821976909, now seen corresponding path program 2 times [2021-05-06 07:12:51,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:51,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619484159] [2021-05-06 07:12:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:51,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:51,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669671835] [2021-05-06 07:12:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:51,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:12:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:12:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 07:12:52,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:52,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619484159] [2021-05-06 07:12:52,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:52,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669671835] [2021-05-06 07:12:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669671835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:12:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100515025] [2021-05-06 07:12:52,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:52,056 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:52,201 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2021-05-06 07:12:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2021-05-06 07:12:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:52,203 INFO L225 Difference]: With dead ends: 131 [2021-05-06 07:12:52,203 INFO L226 Difference]: Without dead ends: 122 [2021-05-06 07:12:52,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:12:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-06 07:12:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-05-06 07:12:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 74 states have internal predecessors, (75), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:12:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2021-05-06 07:12:52,209 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 104 [2021-05-06 07:12:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:52,209 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2021-05-06 07:12:52,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2021-05-06 07:12:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 07:12:52,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:52,210 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:52,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 07:12:52,433 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2081411984, now seen corresponding path program 9 times [2021-05-06 07:12:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:52,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165897178] [2021-05-06 07:12:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:52,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:52,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264108879] [2021-05-06 07:12:52,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:52,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:12:52,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 07:12:52,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 34 proven. 39 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 07:12:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165897178] [2021-05-06 07:12:52,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264108879] [2021-05-06 07:12:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264108879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:52,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:52,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:12:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223501606] [2021-05-06 07:12:52,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:12:52,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:12:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:12:52,734 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:53,006 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2021-05-06 07:12:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:12:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 106 [2021-05-06 07:12:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:53,009 INFO L225 Difference]: With dead ends: 136 [2021-05-06 07:12:53,009 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 07:12:53,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 07:12:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2021-05-06 07:12:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 07:12:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-05-06 07:12:53,013 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 106 [2021-05-06 07:12:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:53,014 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-05-06 07:12:53,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:12:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-05-06 07:12:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 07:12:53,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:53,015 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:53,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 07:12:53,229 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash -124308163, now seen corresponding path program 10 times [2021-05-06 07:12:53,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:53,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876675637] [2021-05-06 07:12:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:53,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:53,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931125972] [2021-05-06 07:12:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:12:55,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:12:55,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 07:12:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:55,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 198 proven. 110 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-05-06 07:12:55,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:55,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876675637] [2021-05-06 07:12:55,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:55,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931125972] [2021-05-06 07:12:55,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931125972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:55,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:55,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:12:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949180718] [2021-05-06 07:12:55,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:12:55,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:12:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:12:55,543 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 07:12:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:12:57,173 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-05-06 07:12:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:12:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 111 [2021-05-06 07:12:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:12:57,174 INFO L225 Difference]: With dead ends: 131 [2021-05-06 07:12:57,174 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 07:12:57,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:12:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 07:12:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 07:12:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 28 states have call successors, (28), 22 states have call predecessors, (28), 21 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:12:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2021-05-06 07:12:57,178 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 111 [2021-05-06 07:12:57,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:12:57,178 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2021-05-06 07:12:57,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 07:12:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2021-05-06 07:12:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 07:12:57,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:12:57,179 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:12:57,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 07:12:57,388 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:12:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:12:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1992307858, now seen corresponding path program 3 times [2021-05-06 07:12:57,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:12:57,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200568749] [2021-05-06 07:12:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:12:57,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:12:57,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718259048] [2021-05-06 07:12:57,397 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 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 07:12:58,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 07:12:58,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:12:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:12:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:12:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:12:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-05-06 07:12:58,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:12:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200568749] [2021-05-06 07:12:58,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:12:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718259048] [2021-05-06 07:12:58,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718259048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:12:58,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:12:58,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:12:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050015393] [2021-05-06 07:12:58,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:12:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:12:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:12:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:12:58,533 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:13:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:13,466 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2021-05-06 07:13:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:13:13,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 127 [2021-05-06 07:13:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:13,468 INFO L225 Difference]: With dead ends: 135 [2021-05-06 07:13:13,468 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 07:13:13,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:13:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 07:13:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-06 07:13:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 81 states have (on average 1.037037037037037) internal successors, (84), 84 states have internal predecessors, (84), 30 states have call successors, (30), 23 states have call predecessors, (30), 22 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:13:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2021-05-06 07:13:13,471 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 127 [2021-05-06 07:13:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:13,472 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2021-05-06 07:13:13,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 07:13:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2021-05-06 07:13:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 07:13:13,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:13,473 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:13:13,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:13,680 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1089028459, now seen corresponding path program 4 times [2021-05-06 07:13:13,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:13,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156960145] [2021-05-06 07:13:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:13,688 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:13,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289099957] [2021-05-06 07:13:13,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:13,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:13:13,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:13:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:13,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-06 07:13:13,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:13,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156960145] [2021-05-06 07:13:13,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:13,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289099957] [2021-05-06 07:13:13,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289099957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:13,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:13,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:13:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621669047] [2021-05-06 07:13:13,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:13:13,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:13:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:13:13,988 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 07:13:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:14,110 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-05-06 07:13:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:13:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 129 [2021-05-06 07:13:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:14,111 INFO L225 Difference]: With dead ends: 160 [2021-05-06 07:13:14,111 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 07:13:14,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:13:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 07:13:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-05-06 07:13:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 97 states have internal predecessors, (99), 35 states have call successors, (35), 27 states have call predecessors, (35), 25 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 07:13:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2021-05-06 07:13:14,118 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 129 [2021-05-06 07:13:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:14,119 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2021-05-06 07:13:14,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 07:13:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2021-05-06 07:13:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 07:13:14,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:14,126 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:13:14,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:14,345 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash -925808019, now seen corresponding path program 3 times [2021-05-06 07:13:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:14,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843029085] [2021-05-06 07:13:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:14,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:14,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328153384] [2021-05-06 07:13:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:14,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:13:14,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:13:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 07:13:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:13:14,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:13:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-05-06 07:13:14,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:13:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843029085] [2021-05-06 07:13:14,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:13:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328153384] [2021-05-06 07:13:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328153384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:13:14,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:13:14,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:13:14,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345477970] [2021-05-06 07:13:14,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:13:14,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:13:14,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:13:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:13:14,723 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-05-06 07:13:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:13:14,923 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2021-05-06 07:13:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:13:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 132 [2021-05-06 07:13:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:13:14,924 INFO L225 Difference]: With dead ends: 160 [2021-05-06 07:13:14,924 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 07:13:14,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:13:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 07:13:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 07:13:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 93 states have (on average 1.032258064516129) internal successors, (96), 95 states have internal predecessors, (96), 32 states have call successors, (32), 26 states have call predecessors, (32), 25 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 07:13:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2021-05-06 07:13:14,929 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 132 [2021-05-06 07:13:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:13:14,929 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2021-05-06 07:13:14,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-05-06 07:13:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2021-05-06 07:13:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 07:13:14,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:13:14,930 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:13:15,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 07:13:15,145 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:13:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:13:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1841306865, now seen corresponding path program 5 times [2021-05-06 07:13:15,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:13:15,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499560152] [2021-05-06 07:13:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:13:15,151 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:13:15,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534526348] [2021-05-06 07:13:15,151 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 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 07:13:16,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 07:13:16,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 07:13:16,567 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 07:13:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 07:13:16,614 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 07:13:16,756 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 07:13:16,756 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 07:13:16,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:13:17,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:13:17 BasicIcfg [2021-05-06 07:13:17,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:13:17,032 INFO L168 Benchmark]: Toolchain (without parser) took 38339.69 ms. Allocated memory was 181.4 MB in the beginning and 319.8 MB in the end (delta: 138.4 MB). Free memory was 147.0 MB in the beginning and 256.2 MB in the end (delta: -109.2 MB). Peak memory consumption was 29.9 MB. Max. memory is 8.0 GB. [2021-05-06 07:13:17,032 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 181.4 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:13:17,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.78 ms. Allocated memory is still 181.4 MB. Free memory was 146.8 MB in the beginning and 164.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 07:13:17,032 INFO L168 Benchmark]: Boogie Preprocessor took 29.65 ms. Allocated memory is still 181.4 MB. Free memory was 164.7 MB in the beginning and 163.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:13:17,032 INFO L168 Benchmark]: RCFGBuilder took 332.91 ms. Allocated memory is still 181.4 MB. Free memory was 163.1 MB in the beginning and 147.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:13:17,033 INFO L168 Benchmark]: IcfgTransformer took 16.55 ms. Allocated memory is still 181.4 MB. Free memory was 147.4 MB in the beginning and 146.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:13:17,033 INFO L168 Benchmark]: TraceAbstraction took 37664.99 ms. Allocated memory was 181.4 MB in the beginning and 319.8 MB in the end (delta: 138.4 MB). Free memory was 145.8 MB in the beginning and 256.2 MB in the end (delta: -110.4 MB). Peak memory consumption was 29.6 MB. Max. memory is 8.0 GB. [2021-05-06 07:13:17,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 181.4 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.78 ms. Allocated memory is still 181.4 MB. Free memory was 146.8 MB in the beginning and 164.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.65 ms. Allocated memory is still 181.4 MB. Free memory was 164.7 MB in the beginning and 163.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 332.91 ms. Allocated memory is still 181.4 MB. Free memory was 163.1 MB in the beginning and 147.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.55 ms. Allocated memory is still 181.4 MB. Free memory was 147.4 MB in the beginning and 146.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 37664.99 ms. Allocated memory was 181.4 MB in the beginning and 319.8 MB in the end (delta: 138.4 MB). Free memory was 145.8 MB in the beginning and 256.2 MB in the end (delta: -110.4 MB). Peak memory consumption was 29.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=17, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=5, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=5, counter=6, n=5, x=125, y=91, z=36] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 37557.2ms, OverallIterations: 27, TraceHistogramMax: 27, EmptinessCheckTime: 33.4ms, AutomataDifference: 20427.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1264 SDtfs, 214 SDslu, 4365 SDs, 0 SdLazy, 2552 SolverSat, 246 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19052.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1822 GetRequests, 1650 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1437.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=25, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 202.9ms AutomataMinimizationTime, 26 MinimizatonAttempts, 79 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 252.4ms SsaConstructionTime, 4897.8ms SatisfiabilityAnalysisTime, 5248.5ms InterpolantComputationTime, 1977 NumberOfCodeBlocks, 1684 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 1794 ConstructedInterpolants, 1 QuantifiedInterpolants, 7217 SizeOfPredicates, 56 NumberOfNonLiveVariables, 4899 ConjunctsInSsa, 446 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 7235/8725 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...