/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/mannadiv_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:52:47,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:52:47,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:52:47,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:52:47,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:52:47,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:52:47,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:52:47,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:52:47,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:52:47,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:52:47,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:52:47,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:52:47,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:52:47,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:52:47,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:52:47,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:52:47,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:52:47,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:52:47,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:52:47,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:52:47,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:52:47,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:52:47,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:52:47,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:52:47,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:52:47,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:52:47,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:52:47,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:52:47,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:52:47,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:52:47,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:52:47,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:52:47,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:52:47,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:52:47,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:52:47,852 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:52:47,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:52:48,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:52:48,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:52:48,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:52:48,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:52:48,084 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:52:48,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-06 09:52:48,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b537b3245/58ff2fe330a54b94bf2c855bdd669e77/FLAG698d41a22 [2021-05-06 09:52:48,438 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:52:48,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-06 09:52:48,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b537b3245/58ff2fe330a54b94bf2c855bdd669e77/FLAG698d41a22 [2021-05-06 09:52:48,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b537b3245/58ff2fe330a54b94bf2c855bdd669e77 [2021-05-06 09:52:48,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:52:48,853 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:52:48,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:52:48,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:52:48,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:52:48,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:52:48" (1/1) ... [2021-05-06 09:52:48,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d84808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:48, skipping insertion in model container [2021-05-06 09:52:48,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:52:48" (1/1) ... [2021-05-06 09:52:48,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:52:48,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:52:48,967 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/mannadiv_unwindbound20.c[573,586] [2021-05-06 09:52:48,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:52:48,985 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:52:48,992 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/mannadiv_unwindbound20.c[573,586] [2021-05-06 09:52:48,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:52:49,003 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:52:49,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49 WrapperNode [2021-05-06 09:52:49,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:52:49,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:52:49,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:52:49,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:52:49,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:52:49,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:52:49,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:52:49,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:52:49,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (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 09:52:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:52:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:52:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:52:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:52:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:52:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:52:49,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:52:49,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:52:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:52:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:52:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:52:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:52:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:52:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:52:49,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:52:49,260 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:52:49,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:52:49 BoogieIcfgContainer [2021-05-06 09:52:49,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:52:49,262 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:52:49,262 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:52:49,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:52:49,264 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:52:49" (1/1) ... [2021-05-06 09:52:49,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:52:49 BasicIcfg [2021-05-06 09:52:49,274 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:52:49,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:52:49,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:52:49,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:52:49,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:52:48" (1/4) ... [2021-05-06 09:52:49,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15631591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:52:49, skipping insertion in model container [2021-05-06 09:52:49,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:49" (2/4) ... [2021-05-06 09:52:49,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15631591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:52:49, skipping insertion in model container [2021-05-06 09:52:49,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:52:49" (3/4) ... [2021-05-06 09:52:49,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15631591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:52:49, skipping insertion in model container [2021-05-06 09:52:49,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:52:49" (4/4) ... [2021-05-06 09:52:49,279 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.cJordan [2021-05-06 09:52:49,282 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:52:49,305 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:52:49,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:52:49,327 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:52:49,327 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:52:49,327 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:52:49,327 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:52:49,327 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:52:49,327 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:52:49,327 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:52:49,327 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:52:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:52:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:52:49,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:49,339 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:49,340 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 09:52:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:49,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167431538] [2021-05-06 09:52:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:49,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:52:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:49,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:52:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 09:52:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:49,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167431538] [2021-05-06 09:52:49,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167431538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:52:49,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:52:49,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:52:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885057760] [2021-05-06 09:52:49,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:52:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:52:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:52:49,594 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:49,666 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-06 09:52:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:52:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:52:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:49,674 INFO L225 Difference]: With dead ends: 31 [2021-05-06 09:52:49,674 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 09:52:49,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:52:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 09:52:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 09:52:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:52:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 09:52:49,699 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 09:52:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:49,699 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 09:52:49,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 09:52:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 09:52:49,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:49,701 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:49,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:52:49,702 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 09:52:49,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:49,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566778562] [2021-05-06 09:52:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:49,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:49,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307614761] [2021-05-06 09:52:49,732 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 09:52:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:52:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:49,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:49,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:49,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:49,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:49,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:49,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:49,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566778562] [2021-05-06 09:52:49,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:49,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307614761] [2021-05-06 09:52:49,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307614761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:52:49,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:52:49,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:52:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011871059] [2021-05-06 09:52:49,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:52:49,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:52:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:52:49,911 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:49,918 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 09:52:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:52:49,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 09:52:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:49,919 INFO L225 Difference]: With dead ends: 27 [2021-05-06 09:52:49,919 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 09:52:49,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:52:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 09:52:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 09:52:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:52:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 09:52:49,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 09:52:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:49,923 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 09:52:49,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 09:52:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 09:52:49,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:49,924 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:50,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:52:50,133 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 09:52:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:50,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425809686] [2021-05-06 09:52:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:50,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:50,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084606444] [2021-05-06 09:52:50,149 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 09:52:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:52:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:50,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:50,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:50,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 09:52:50,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:50,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425809686] [2021-05-06 09:52:50,325 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:50,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084606444] [2021-05-06 09:52:50,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084606444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:52:50,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:52:50,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 09:52:50,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878829347] [2021-05-06 09:52:50,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:52:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:52:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:50,326 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 09:52:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:50,380 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-06 09:52:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:52:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 09:52:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:50,382 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:52:50,382 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 09:52:50,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:52:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 09:52:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 09:52:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:52:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 09:52:50,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 09:52:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:50,390 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 09:52:50,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 09:52:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 09:52:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:52:50,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:50,391 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:50,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:50,591 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 09:52:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:50,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124234845] [2021-05-06 09:52:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:50,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:50,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197505330] [2021-05-06 09:52:50,600 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 09:52:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:52:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:50,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:50,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:50,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:50,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124234845] [2021-05-06 09:52:50,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:50,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197505330] [2021-05-06 09:52:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197505330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:50,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:50,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:52:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804188423] [2021-05-06 09:52:50,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:52:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:52:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:50,732 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:52:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:50,803 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-06 09:52:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:52:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 09:52:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:50,805 INFO L225 Difference]: With dead ends: 37 [2021-05-06 09:52:50,805 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 09:52:50,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:52:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 09:52:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-06 09:52:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:52:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 09:52:50,808 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 09:52:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:50,808 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 09:52:50,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:52:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 09:52:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 09:52:50,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:50,809 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:51,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:51,019 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 09:52:51,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:51,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347780993] [2021-05-06 09:52:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:51,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:51,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484031352] [2021-05-06 09:52:51,027 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 09:52:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:52:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:51,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347780993] [2021-05-06 09:52:51,161 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484031352] [2021-05-06 09:52:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484031352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:51,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:51,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:52:51,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963570483] [2021-05-06 09:52:51,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:52:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:52:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:52:51,162 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:52:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:51,186 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-06 09:52:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:52:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 09:52:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:51,188 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:52:51,188 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 09:52:51,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:52:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 09:52:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 09:52:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:52:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 09:52:51,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 09:52:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:51,199 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 09:52:51,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:52:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 09:52:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 09:52:51,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:51,205 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:51,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:51,405 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-06 09:52:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:51,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965321332] [2021-05-06 09:52:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:51,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:51,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676224861] [2021-05-06 09:52:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:52:51,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:52:51,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:52:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:51,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:51,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965321332] [2021-05-06 09:52:51,524 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:51,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676224861] [2021-05-06 09:52:51,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676224861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:51,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:51,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:52:51,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460453869] [2021-05-06 09:52:51,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:52:51,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:52:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:52:51,525 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:52:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:51,560 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 09:52:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:52:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 09:52:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:51,561 INFO L225 Difference]: With dead ends: 47 [2021-05-06 09:52:51,561 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 09:52:51,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 09:52:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 09:52:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:52:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 09:52:51,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 09:52:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:51,564 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 09:52:51,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:52:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 09:52:51,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 09:52:51,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:51,565 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:51,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 09:52:51,769 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-06 09:52:51,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:51,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914759684] [2021-05-06 09:52:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:51,776 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:51,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744162743] [2021-05-06 09:52:51,776 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 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 09:52:51,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:52:51,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:52:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:51,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:51,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:51,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914759684] [2021-05-06 09:52:51,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:51,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744162743] [2021-05-06 09:52:51,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744162743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:51,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:51,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:52:51,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612877094] [2021-05-06 09:52:51,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:52:51,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:52:51,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:52:51,948 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 09:52:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:51,991 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-06 09:52:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:52:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 09:52:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:51,993 INFO L225 Difference]: With dead ends: 56 [2021-05-06 09:52:51,993 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 09:52:51,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:52:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 09:52:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 09:52:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:52:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 09:52:52,004 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 09:52:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:52,004 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 09:52:52,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 09:52:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 09:52:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 09:52:52,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,009 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:52,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:52,210 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-06 09:52:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:52,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249653723] [2021-05-06 09:52:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:52,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:52,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985801953] [2021-05-06 09:52:52,218 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 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 09:52:52,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:52:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:52,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:52:52,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:52,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:52,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:52,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249653723] [2021-05-06 09:52:52,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:52,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985801953] [2021-05-06 09:52:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985801953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:52:52,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570252693] [2021-05-06 09:52:52,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:52:52,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:52:52,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:52,377 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 09:52:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:52,447 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 09:52:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:52:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 09:52:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:52,448 INFO L225 Difference]: With dead ends: 65 [2021-05-06 09:52:52,448 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 09:52:52,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:52:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 09:52:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 09:52:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:52:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 09:52:52,451 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 09:52:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:52,451 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 09:52:52,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 09:52:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 09:52:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 09:52:52,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,452 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:52,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:52,652 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-06 09:52:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:52,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559986908] [2021-05-06 09:52:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:52,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:52,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857263044] [2021-05-06 09:52:52,659 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 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 09:52:52,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 09:52:52,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:52:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:52,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:52,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559986908] [2021-05-06 09:52:52,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857263044] [2021-05-06 09:52:52,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857263044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:52,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:52,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:52:52,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268273015] [2021-05-06 09:52:52,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:52:52,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:52,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:52:52,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:52:52,863 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 09:52:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:52,923 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-05-06 09:52:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 09:52:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 09:52:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:52,924 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:52:52,924 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 09:52:52,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:52:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 09:52:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 09:52:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:52:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 09:52:52,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 09:52:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:52,927 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 09:52:52,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 09:52:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 09:52:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 09:52:52,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,928 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:53,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 09:52:53,145 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262200, now seen corresponding path program 6 times [2021-05-06 09:52:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:53,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283518275] [2021-05-06 09:52:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:53,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:53,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200246940] [2021-05-06 09:52:53,152 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 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 09:52:53,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 09:52:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:53,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:52:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:53,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:53,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:53,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283518275] [2021-05-06 09:52:53,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200246940] [2021-05-06 09:52:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200246940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:53,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:53,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:52:53,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567605037] [2021-05-06 09:52:53,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:52:53,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:52:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:52:53,366 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 09:52:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:53,436 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-06 09:52:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 09:52:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 09:52:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:53,441 INFO L225 Difference]: With dead ends: 83 [2021-05-06 09:52:53,441 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 09:52:53,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 09:52:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 09:52:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 09:52:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:52:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 09:52:53,448 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 09:52:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:53,449 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 09:52:53,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 09:52:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 09:52:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 09:52:53,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:53,451 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:53,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:53,665 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1720170109, now seen corresponding path program 7 times [2021-05-06 09:52:53,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:53,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881895288] [2021-05-06 09:52:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:53,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:53,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582471667] [2021-05-06 09:52:53,671 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 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 09:52:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 09:52:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:53,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:53,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881895288] [2021-05-06 09:52:53,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582471667] [2021-05-06 09:52:53,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582471667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:53,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:53,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:52:53,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710651857] [2021-05-06 09:52:53,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:52:53,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:53,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:52:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:52:53,884 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 09:52:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:53,961 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-06 09:52:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 09:52:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 09:52:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:53,962 INFO L225 Difference]: With dead ends: 92 [2021-05-06 09:52:53,962 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 09:52:53,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:52:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 09:52:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 09:52:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 09:52:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 09:52:53,965 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 09:52:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:53,965 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 09:52:53,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 09:52:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 09:52:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 09:52:53,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:53,966 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:54,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:54,185 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:54,185 INFO L82 PathProgramCache]: Analyzing trace with hash -327979176, now seen corresponding path program 8 times [2021-05-06 09:52:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557894087] [2021-05-06 09:52:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:54,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:54,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268881892] [2021-05-06 09:52:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:54,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:52:54,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 09:52:54,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:54,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:54,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557894087] [2021-05-06 09:52:54,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:54,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268881892] [2021-05-06 09:52:54,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268881892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:54,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:54,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:52:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104624469] [2021-05-06 09:52:54,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:52:54,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:54,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:52:54,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:52:54,425 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 09:52:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:54,544 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-05-06 09:52:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 09:52:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 09:52:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:54,545 INFO L225 Difference]: With dead ends: 101 [2021-05-06 09:52:54,545 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 09:52:54,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 09:52:54,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 09:52:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 09:52:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:52:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 09:52:54,549 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 09:52:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:54,549 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 09:52:54,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 09:52:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 09:52:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 09:52:54,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:54,550 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:54,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 09:52:54,765 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1572009693, now seen corresponding path program 9 times [2021-05-06 09:52:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:54,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659036988] [2021-05-06 09:52:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:54,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:54,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852019273] [2021-05-06 09:52:54,771 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 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 09:52:54,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 09:52:54,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 09:52:54,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:55,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:55,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659036988] [2021-05-06 09:52:55,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:55,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852019273] [2021-05-06 09:52:55,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852019273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:55,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:55,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 09:52:55,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935409578] [2021-05-06 09:52:55,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 09:52:55,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:55,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 09:52:55,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:52:55,039 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 09:52:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:55,141 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-05-06 09:52:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 09:52:55,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 09:52:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:55,142 INFO L225 Difference]: With dead ends: 110 [2021-05-06 09:52:55,142 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 09:52:55,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 09:52:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 09:52:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 09:52:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:52:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 09:52:55,146 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 09:52:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:55,146 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 09:52:55,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 09:52:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 09:52:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 09:52:55,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:55,147 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:55,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 09:52:55,355 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 10 times [2021-05-06 09:52:55,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:55,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22709473] [2021-05-06 09:52:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:55,360 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:55,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470769692] [2021-05-06 09:52:55,361 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 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 09:52:55,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:52:55,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:52:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:55,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:55,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22709473] [2021-05-06 09:52:55,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:55,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470769692] [2021-05-06 09:52:55,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470769692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:55,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:55,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 09:52:55,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386728848] [2021-05-06 09:52:55,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 09:52:55,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 09:52:55,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:52:55,608 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 09:52:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:55,724 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-05-06 09:52:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 09:52:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-06 09:52:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:55,725 INFO L225 Difference]: With dead ends: 119 [2021-05-06 09:52:55,725 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 09:52:55,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 09:52:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 09:52:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 09:52:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:52:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-06 09:52:55,728 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-06 09:52:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:55,728 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-06 09:52:55,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 09:52:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-06 09:52:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 09:52:55,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:55,729 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:55,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 09:52:55,945 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1200431299, now seen corresponding path program 11 times [2021-05-06 09:52:55,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:55,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311532699] [2021-05-06 09:52:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:55,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:55,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910297867] [2021-05-06 09:52:55,950 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 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 09:52:56,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 09:52:56,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:56,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:52:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:56,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:56,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311532699] [2021-05-06 09:52:56,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910297867] [2021-05-06 09:52:56,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910297867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:56,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:56,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 09:52:56,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695239328] [2021-05-06 09:52:56,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 09:52:56,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 09:52:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 09:52:56,229 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 09:52:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:56,342 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-05-06 09:52:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 09:52:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-06 09:52:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:56,343 INFO L225 Difference]: With dead ends: 128 [2021-05-06 09:52:56,343 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 09:52:56,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 09:52:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 09:52:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 09:52:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 09:52:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-06 09:52:56,346 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-06 09:52:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:56,347 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-06 09:52:56,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 09:52:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-06 09:52:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 09:52:56,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:56,348 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:56,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:56,548 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1791180776, now seen corresponding path program 12 times [2021-05-06 09:52:56,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:56,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155099779] [2021-05-06 09:52:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:56,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:56,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001596556] [2021-05-06 09:52:56,556 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 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 09:52:56,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 09:52:56,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:52:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:56,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:56,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155099779] [2021-05-06 09:52:56,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001596556] [2021-05-06 09:52:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001596556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:56,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:56,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 09:52:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127253451] [2021-05-06 09:52:56,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 09:52:56,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:56,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 09:52:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 09:52:56,855 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 09:52:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:57,024 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-05-06 09:52:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 09:52:57,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-06 09:52:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:57,026 INFO L225 Difference]: With dead ends: 137 [2021-05-06 09:52:57,026 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 09:52:57,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 09:52:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 09:52:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 09:52:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 09:52:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-06 09:52:57,030 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-06 09:52:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:57,030 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-06 09:52:57,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 09:52:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-06 09:52:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 09:52:57,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:57,031 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:57,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:52:57,233 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash -166555549, now seen corresponding path program 13 times [2021-05-06 09:52:57,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:57,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825032323] [2021-05-06 09:52:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:57,239 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:57,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964258196] [2021-05-06 09:52:57,239 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 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 09:52:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:57,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 09:52:57,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:57,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:57,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825032323] [2021-05-06 09:52:57,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:57,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964258196] [2021-05-06 09:52:57,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964258196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:57,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:57,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 09:52:57,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311517164] [2021-05-06 09:52:57,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 09:52:57,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:57,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 09:52:57,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 09:52:57,561 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 09:52:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:57,733 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2021-05-06 09:52:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 09:52:57,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-06 09:52:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:57,734 INFO L225 Difference]: With dead ends: 146 [2021-05-06 09:52:57,734 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 09:52:57,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 09:52:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 09:52:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 09:52:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 09:52:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-06 09:52:57,737 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-06 09:52:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:57,737 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-06 09:52:57,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 09:52:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-06 09:52:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 09:52:57,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:57,738 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:57,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 09:52:57,955 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash -229972872, now seen corresponding path program 14 times [2021-05-06 09:52:57,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:57,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756181068] [2021-05-06 09:52:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:57,960 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:57,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015274026] [2021-05-06 09:52:57,961 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 09:52:58,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:52:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:52:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:58,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:58,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:58,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756181068] [2021-05-06 09:52:58,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:58,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015274026] [2021-05-06 09:52:58,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015274026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:58,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:58,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 09:52:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162372679] [2021-05-06 09:52:58,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 09:52:58,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 09:52:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:52:58,298 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 09:52:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:58,476 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-05-06 09:52:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 09:52:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-06 09:52:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:58,477 INFO L225 Difference]: With dead ends: 155 [2021-05-06 09:52:58,477 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 09:52:58,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 09:52:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 09:52:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 09:52:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 09:52:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-06 09:52:58,481 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-06 09:52:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:58,481 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-06 09:52:58,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 09:52:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-06 09:52:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 09:52:58,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:58,482 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:58,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 09:52:58,697 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1480022019, now seen corresponding path program 15 times [2021-05-06 09:52:58,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:58,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794791550] [2021-05-06 09:52:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:58,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:58,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925484629] [2021-05-06 09:52:58,704 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 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 09:52:58,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 09:52:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 09:52:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:58,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:58,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:59,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794791550] [2021-05-06 09:52:59,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925484629] [2021-05-06 09:52:59,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925484629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:59,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:59,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 09:52:59,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351288036] [2021-05-06 09:52:59,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 09:52:59,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 09:52:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 09:52:59,080 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 09:52:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:59,287 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-05-06 09:52:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 09:52:59,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-06 09:52:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:59,289 INFO L225 Difference]: With dead ends: 164 [2021-05-06 09:52:59,289 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 09:52:59,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 09:52:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 09:52:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 09:52:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 09:52:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-06 09:52:59,292 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-06 09:52:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:59,293 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-06 09:52:59,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 09:52:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-06 09:52:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-06 09:52:59,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:59,294 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:59,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:59,499 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2105323736, now seen corresponding path program 16 times [2021-05-06 09:52:59,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:59,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122659561] [2021-05-06 09:52:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:59,504 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:59,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092690823] [2021-05-06 09:52:59,504 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 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 09:52:59,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:52:59,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 09:52:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:59,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:59,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122659561] [2021-05-06 09:52:59,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:59,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092690823] [2021-05-06 09:52:59,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092690823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:59,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:59,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 09:52:59,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249900199] [2021-05-06 09:52:59,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 09:52:59,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 09:52:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 09:52:59,887 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 09:53:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:00,099 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2021-05-06 09:53:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 09:53:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-06 09:53:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:00,100 INFO L225 Difference]: With dead ends: 173 [2021-05-06 09:53:00,100 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 09:53:00,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 09:53:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 09:53:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 09:53:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 09:53:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-06 09:53:00,103 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-06 09:53:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:00,104 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-06 09:53:00,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 09:53:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-06 09:53:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 09:53:00,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:00,105 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:00,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:00,313 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash -170559581, now seen corresponding path program 17 times [2021-05-06 09:53:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:00,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048283148] [2021-05-06 09:53:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:00,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:00,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448133030] [2021-05-06 09:53:00,318 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 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 09:53:00,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 09:53:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:53:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 09:53:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:00,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:00,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:00,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048283148] [2021-05-06 09:53:00,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:00,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448133030] [2021-05-06 09:53:00,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448133030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:00,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:00,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 09:53:00,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416613502] [2021-05-06 09:53:00,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 09:53:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:00,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 09:53:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 09:53:00,756 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 09:53:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:00,983 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2021-05-06 09:53:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 09:53:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-06 09:53:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:00,985 INFO L225 Difference]: With dead ends: 182 [2021-05-06 09:53:00,985 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 09:53:00,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 09:53:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 09:53:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 09:53:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:53:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-06 09:53:00,988 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-06 09:53:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:00,988 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-06 09:53:00,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 09:53:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-06 09:53:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-06 09:53:00,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:00,989 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:01,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 09:53:01,205 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash -466082504, now seen corresponding path program 18 times [2021-05-06 09:53:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:01,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733625532] [2021-05-06 09:53:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:01,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:01,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055305008] [2021-05-06 09:53:01,210 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 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 09:53:01,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 09:53:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:53:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 09:53:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:01,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:01,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733625532] [2021-05-06 09:53:01,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055305008] [2021-05-06 09:53:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055305008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:01,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:01,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 09:53:01,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591037343] [2021-05-06 09:53:01,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 09:53:01,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 09:53:01,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 09:53:01,674 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 09:53:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:01,921 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-05-06 09:53:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 09:53:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-06 09:53:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:01,923 INFO L225 Difference]: With dead ends: 191 [2021-05-06 09:53:01,923 INFO L226 Difference]: Without dead ends: 191 [2021-05-06 09:53:01,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 09:53:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-06 09:53:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-06 09:53:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 09:53:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-06 09:53:01,926 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-06 09:53:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:01,927 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-06 09:53:01,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 09:53:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-06 09:53:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 09:53:01,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:01,928 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:02,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 09:53:02,145 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash -733548733, now seen corresponding path program 19 times [2021-05-06 09:53:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:02,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089996312] [2021-05-06 09:53:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:02,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:02,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345377059] [2021-05-06 09:53:02,150 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 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 09:53:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 09:53:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:02,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089996312] [2021-05-06 09:53:02,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345377059] [2021-05-06 09:53:02,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345377059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:02,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:02,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 09:53:02,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969317081] [2021-05-06 09:53:02,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 09:53:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:02,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 09:53:02,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 09:53:02,599 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 09:53:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:02,890 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2021-05-06 09:53:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 09:53:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-06 09:53:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:02,891 INFO L225 Difference]: With dead ends: 200 [2021-05-06 09:53:02,891 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 09:53:02,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 09:53:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 09:53:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 09:53:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:53:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-06 09:53:02,895 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-06 09:53:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:02,895 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-06 09:53:02,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 09:53:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-06 09:53:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-06 09:53:02,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:02,896 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:03,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:03,114 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:03,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2040315496, now seen corresponding path program 20 times [2021-05-06 09:53:03,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:03,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626493572] [2021-05-06 09:53:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:03,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:03,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263609300] [2021-05-06 09:53:03,127 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 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 09:53:03,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:53:03,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 09:53:03,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 09:53:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 09:53:03,383 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 09:53:03,566 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 09:53:03,566 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 09:53:03,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 09:53:03,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:53:03 BasicIcfg [2021-05-06 09:53:03,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 09:53:03,843 INFO L168 Benchmark]: Toolchain (without parser) took 14990.24 ms. Allocated memory was 190.8 MB in the beginning and 275.8 MB in the end (delta: 84.9 MB). Free memory was 157.2 MB in the beginning and 204.4 MB in the end (delta: -47.3 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:03,843 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 190.8 MB. Free memory is still 173.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:53:03,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.39 ms. Allocated memory is still 190.8 MB. Free memory was 156.8 MB in the beginning and 147.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:03,843 INFO L168 Benchmark]: Boogie Preprocessor took 44.00 ms. Allocated memory is still 190.8 MB. Free memory was 147.2 MB in the beginning and 174.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:03,843 INFO L168 Benchmark]: RCFGBuilder took 212.47 ms. Allocated memory is still 190.8 MB. Free memory was 174.7 MB in the beginning and 159.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:03,843 INFO L168 Benchmark]: IcfgTransformer took 12.11 ms. Allocated memory is still 190.8 MB. Free memory was 159.8 MB in the beginning and 158.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:03,844 INFO L168 Benchmark]: TraceAbstraction took 14567.90 ms. Allocated memory was 190.8 MB in the beginning and 275.8 MB in the end (delta: 84.9 MB). Free memory was 158.2 MB in the beginning and 204.4 MB in the end (delta: -46.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-05-06 09:53:03,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 190.8 MB. Free memory is still 173.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 147.39 ms. Allocated memory is still 190.8 MB. Free memory was 156.8 MB in the beginning and 147.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.00 ms. Allocated memory is still 190.8 MB. Free memory was 147.2 MB in the beginning and 174.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 212.47 ms. Allocated memory is still 190.8 MB. Free memory was 174.7 MB in the beginning and 159.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.11 ms. Allocated memory is still 190.8 MB. Free memory was 159.8 MB in the beginning and 158.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14567.90 ms. Allocated memory was 190.8 MB in the beginning and 275.8 MB in the end (delta: 84.9 MB). Free memory was 158.2 MB in the beginning and 204.4 MB in the end (delta: -46.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: 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)=25, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] EXPR counter++ VAL [\old(counter)=0, counter=7, counter++=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] EXPR counter++ VAL [\old(counter)=0, counter=8, counter++=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] EXPR counter++ VAL [\old(counter)=0, counter=9, counter++=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] EXPR counter++ VAL [\old(counter)=0, counter=10, counter++=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] EXPR counter++ VAL [\old(counter)=0, counter=11, counter++=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] EXPR counter++ VAL [\old(counter)=0, counter=12, counter++=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] EXPR counter++ VAL [\old(counter)=0, counter=13, counter++=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] EXPR counter++ VAL [\old(counter)=0, counter=14, counter++=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] EXPR counter++ VAL [\old(counter)=0, counter=15, counter++=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=16, counter++=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=17, counter++=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=18, counter++=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=19, counter++=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=20, counter++=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=21, counter++=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] COND FALSE !(counter++<20) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14455.4ms, OverallIterations: 24, TraceHistogramMax: 21, EmptinessCheckTime: 31.1ms, AutomataDifference: 2807.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 782 SDtfs, 891 SDslu, 2563 SDs, 0 SdLazy, 1309 SolverSat, 265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 893.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2405 GetRequests, 1967 SyntacticMatches, 0 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2631.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=23, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 102.7ms AutomataMinimizationTime, 23 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 229.2ms SsaConstructionTime, 865.9ms SatisfiabilityAnalysisTime, 4441.3ms InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2447 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 2221 ConstructedInterpolants, 0 QuantifiedInterpolants, 6433 SizeOfPredicates, 215 NumberOfNonLiveVariables, 7175 ConjunctsInSsa, 504 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 473/11114 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...