/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/divbin2_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:04:46,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:04:46,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:04:46,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:04:46,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:04:46,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:04:46,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:04:46,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:04:46,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:04:46,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:04:46,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:04:46,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:04:46,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:04:46,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:04:46,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:04:46,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:04:46,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:04:46,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:04:46,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:04:46,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:04:46,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:04:46,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:04:46,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:04:46,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:04:46,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:04:46,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:04:46,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:04:46,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:04:46,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:04:46,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:04:46,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:04:46,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:04:46,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:04:46,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:04:46,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:04:46,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:04:46,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:04:46,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:04:46,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:04:46,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:04:46,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:04:46,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:04:46,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:04:46,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:04:46,359 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:04:46,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:04:46,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:04:46,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:04:46,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:04:46,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:04:46,627 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:04:46,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i [2021-05-02 20:04:46,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9047835e3/29a6608e23f941de951ec16cdcb24f28/FLAG5cb8eada8 [2021-05-02 20:04:47,047 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:04:47,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound100.i [2021-05-02 20:04:47,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9047835e3/29a6608e23f941de951ec16cdcb24f28/FLAG5cb8eada8 [2021-05-02 20:04:47,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9047835e3/29a6608e23f941de951ec16cdcb24f28 [2021-05-02 20:04:47,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:04:47,072 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:04:47,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:04:47,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:04:47,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:04:47,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b8d90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47, skipping insertion in model container [2021-05-02 20:04:47,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:04:47,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:04:47,273 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/divbin2_valuebound100.i[959,972] [2021-05-02 20:04:47,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:04:47,286 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:04:47,326 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/divbin2_valuebound100.i[959,972] [2021-05-02 20:04:47,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:04:47,346 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:04:47,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47 WrapperNode [2021-05-02 20:04:47,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:04:47,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:04:47,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:04:47,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:04:47,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:04:47,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:04:47,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:04:47,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:04:47,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:04:47,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:04:47,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:04:47,428 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:04:47,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:04:47,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:04:47,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:04:47,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:04:47,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:04:47,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:04:47,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:04:47,429 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:04:47,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:04:47,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:04:47,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:04:47,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:04:47,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:04:47,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:04:47,663 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:04:47,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:04:47 BoogieIcfgContainer [2021-05-02 20:04:47,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:04:47,664 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:04:47,664 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:04:47,665 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:04:47,667 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:04:47" (1/1) ... [2021-05-02 20:04:47,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:04:47 BasicIcfg [2021-05-02 20:04:47,678 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:04:47,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:04:47,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:04:47,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:04:47,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:04:47" (1/4) ... [2021-05-02 20:04:47,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cd4ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:04:47, skipping insertion in model container [2021-05-02 20:04:47,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:04:47" (2/4) ... [2021-05-02 20:04:47,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cd4ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:04:47, skipping insertion in model container [2021-05-02 20:04:47,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:04:47" (3/4) ... [2021-05-02 20:04:47,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44cd4ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:04:47, skipping insertion in model container [2021-05-02 20:04:47,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:04:47" (4/4) ... [2021-05-02 20:04:47,683 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.iJordan [2021-05-02 20:04:47,687 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:04:47,691 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:04:47,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:04:47,722 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:04:47,722 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:04:47,722 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:04:47,723 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:04:47,723 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:04:47,723 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:04:47,723 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:04:47,723 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:04:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:04:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:04:47,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:47,740 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:47,741 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2021-05-02 20:04:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:47,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34138287] [2021-05-02 20:04:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:47,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:04:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:47,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:04:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:04:47,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:47,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34138287] [2021-05-02 20:04:47,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34138287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:04:47,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:04:47,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:04:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407624686] [2021-05-02 20:04:47,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:04:47,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:04:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:04:47,977 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:04:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:48,039 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 20:04:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:04:48,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:04:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:48,045 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:04:48,045 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:04:48,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:04:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:04:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:04:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:04:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:04:48,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 20:04:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:48,069 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:04:48,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:04:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:04:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 20:04:48,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:48,069 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:48,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:04:48,070 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2021-05-02 20:04:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:48,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097070881] [2021-05-02 20:04:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:48,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:48,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592558496] [2021-05-02 20:04:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:04:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:48,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:48,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:04:48,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:48,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097070881] [2021-05-02 20:04:48,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:48,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592558496] [2021-05-02 20:04:48,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592558496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:04:48,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:04:48,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:04:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396461952] [2021-05-02 20:04:48,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:04:48,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:48,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:04:48,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:04:48,484 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:04:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:48,624 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:04:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:04:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 20:04:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:48,627 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:04:48,627 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:04:48,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:04:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:04:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:04:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:04:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 20:04:48,640 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 20:04:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:48,641 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 20:04:48,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:04:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 20:04:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 20:04:48,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:48,648 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:48,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:04:48,861 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2021-05-02 20:04:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:48,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465766350] [2021-05-02 20:04:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:48,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:48,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285736501] [2021-05-02 20:04:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:04:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:49,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:04:49,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:49,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465766350] [2021-05-02 20:04:49,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:49,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285736501] [2021-05-02 20:04:49,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285736501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:04:49,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:04:49,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:04:49,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302539332] [2021-05-02 20:04:49,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:04:49,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:04:49,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:04:49,072 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:04:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:49,165 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:04:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:04:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 20:04:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:49,166 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:04:49,167 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:04:49,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:04:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:04:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:04:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:04:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 20:04:49,170 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 20:04:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:49,170 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 20:04:49,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:04:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 20:04:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:04:49,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:49,171 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:49,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:49,385 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2021-05-02 20:04:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:49,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141941665] [2021-05-02 20:04:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:49,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:49,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352663923] [2021-05-02 20:04:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:04:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:04:49,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:49,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141941665] [2021-05-02 20:04:49,469 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:49,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352663923] [2021-05-02 20:04:49,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352663923] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:04:49,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:04:49,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:04:49,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556511326] [2021-05-02 20:04:49,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:04:49,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:04:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:04:49,470 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:49,488 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 20:04:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:04:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 20:04:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:49,489 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:04:49,489 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:04:49,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:04:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:04:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:04:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:04:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 20:04:49,493 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 20:04:49,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:49,493 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 20:04:49,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 20:04:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:04:49,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:49,494 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] [2021-05-02 20:04:49,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:49,711 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2021-05-02 20:04:49,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:49,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952975470] [2021-05-02 20:04:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:49,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:49,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730354845] [2021-05-02 20:04:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:04:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:04:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:49,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:04:49,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952975470] [2021-05-02 20:04:49,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730354845] [2021-05-02 20:04:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730354845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:04:49,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:04:49,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:04:49,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669418144] [2021-05-02 20:04:49,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:04:49,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:49,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:04:49,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:04:49,941 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:50,065 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-05-02 20:04:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:04:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:04:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:50,066 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:04:50,067 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:04:50,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:04:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:04:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 20:04:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:04:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:04:50,071 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 20:04:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:50,071 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:04:50,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:04:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:04:50,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:50,073 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:50,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:50,273 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash -976975752, now seen corresponding path program 2 times [2021-05-02 20:04:50,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:50,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501712375] [2021-05-02 20:04:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:50,282 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:50,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215426896] [2021-05-02 20:04:50,283 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 [2021-05-02 20:04:50,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:04:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:04:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:04:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:50,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:04:50,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:50,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501712375] [2021-05-02 20:04:50,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:50,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215426896] [2021-05-02 20:04:50,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215426896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:04:50,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:04:50,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:04:50,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903118545] [2021-05-02 20:04:50,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:04:50,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:50,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:04:50,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:04:50,494 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:50,696 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-05-02 20:04:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:04:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:04:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:50,699 INFO L225 Difference]: With dead ends: 83 [2021-05-02 20:04:50,699 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:04:50,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:04:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:04:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 20:04:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:04:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:04:50,703 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 20:04:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:50,703 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:04:50,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:04:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:04:50,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:50,704 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:50,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:04:50,920 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:50,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:50,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1490579311, now seen corresponding path program 3 times [2021-05-02 20:04:50,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:50,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436556280] [2021-05-02 20:04:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:50,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:50,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803044827] [2021-05-02 20:04:50,931 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 [2021-05-02 20:04:50,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:04:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:04:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:04:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:50,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:04:51,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:51,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436556280] [2021-05-02 20:04:51,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:51,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803044827] [2021-05-02 20:04:51,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803044827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:04:51,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:04:51,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:04:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976217443] [2021-05-02 20:04:51,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:04:51,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:04:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:04:51,140 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:51,243 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-05-02 20:04:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:04:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 20:04:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:51,244 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:04:51,244 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:04:51,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:04:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:04:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 20:04:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:04:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 20:04:51,247 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 20:04:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:51,248 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 20:04:51,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:04:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 20:04:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:04:51,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:51,248 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:51,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:51,456 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:51,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1815734547, now seen corresponding path program 4 times [2021-05-02 20:04:51,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:51,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225508306] [2021-05-02 20:04:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:51,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:51,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724750615] [2021-05-02 20:04:51,463 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 [2021-05-02 20:04:51,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:04:51,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:04:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:04:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:51,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:04:51,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:51,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225508306] [2021-05-02 20:04:51,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:51,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724750615] [2021-05-02 20:04:51,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724750615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:04:51,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:04:51,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:04:51,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861247359] [2021-05-02 20:04:51,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:04:51,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:04:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:04:51,802 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:04:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:51,912 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-05-02 20:04:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:04:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 20:04:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:51,914 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:04:51,914 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:04:51,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:04:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:04:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:04:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:04:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 20:04:51,926 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 20:04:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:51,927 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 20:04:51,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:04:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 20:04:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:04:51,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:51,929 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:52,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:04:52,135 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -79763386, now seen corresponding path program 5 times [2021-05-02 20:04:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:52,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698244296] [2021-05-02 20:04:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:52,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:52,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378245976] [2021-05-02 20:04:52,143 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 [2021-05-02 20:04:52,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 20:04:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:04:52,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 20:04:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:04:52,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:04:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:04:52,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:04:52,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698244296] [2021-05-02 20:04:52,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:04:52,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378245976] [2021-05-02 20:04:52,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378245976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:04:52,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:04:52,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:04:52,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067325429] [2021-05-02 20:04:52,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:04:52,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:04:52,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:04:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:04:52,691 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:04:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:04:52,953 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-05-02 20:04:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:04:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 20:04:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:04:52,955 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:04:52,955 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:04:52,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:04:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:04:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 20:04:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:04:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 20:04:52,958 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 20:04:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:04:52,959 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 20:04:52,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:04:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 20:04:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:04:52,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:04:52,960 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:04:53,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:04:53,162 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:04:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:04:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1741211487, now seen corresponding path program 6 times [2021-05-02 20:04:53,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:04:53,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611547072] [2021-05-02 20:04:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:04:53,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:04:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094613935] [2021-05-02 20:04:53,194 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 [2021-05-02 20:05:07,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-02 20:05:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:05:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 20:05:07,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:08,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:08,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:08,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:08,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:08,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:08,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:05:08,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:08,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611547072] [2021-05-02 20:05:08,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:08,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094613935] [2021-05-02 20:05:08,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094613935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:08,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:08,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:05:08,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598983878] [2021-05-02 20:05:08,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:05:08,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:05:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:05:08,352 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:08,650 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-05-02 20:05:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:05:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 20:05:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:08,651 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:05:08,651 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:05:08,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:05:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:05:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-05-02 20:05:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:05:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-05-02 20:05:08,655 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 41 [2021-05-02 20:05:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:08,656 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-05-02 20:05:08,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-05-02 20:05:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:05:08,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:08,657 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:08,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:05:08,865 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash -648592328, now seen corresponding path program 7 times [2021-05-02 20:05:08,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:08,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42323187] [2021-05-02 20:05:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:08,873 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:08,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663120955] [2021-05-02 20:05:08,873 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 [2021-05-02 20:05:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:05:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:05:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:09,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:09,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:09,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:05:09,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:09,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42323187] [2021-05-02 20:05:09,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:09,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663120955] [2021-05-02 20:05:09,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663120955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:09,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:09,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:05:09,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567736902] [2021-05-02 20:05:09,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:05:09,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:09,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:05:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:05:09,384 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 15 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:09,674 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-05-02 20:05:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:05:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 15 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-05-02 20:05:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:09,676 INFO L225 Difference]: With dead ends: 106 [2021-05-02 20:05:09,676 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 20:05:09,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:05:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 20:05:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2021-05-02 20:05:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:05:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-05-02 20:05:09,680 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 43 [2021-05-02 20:05:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:09,680 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-05-02 20:05:09,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 15 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-05-02 20:05:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:05:09,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:09,681 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:09,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:05:09,889 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 557444817, now seen corresponding path program 8 times [2021-05-02 20:05:09,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:09,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812527547] [2021-05-02 20:05:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:09,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:09,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869711879] [2021-05-02 20:05:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:05:10,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:05:10,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:05:10,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 20:05:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:10,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:10,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:10,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:10,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:05:10,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:10,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812527547] [2021-05-02 20:05:10,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:10,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869711879] [2021-05-02 20:05:10,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869711879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:10,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:10,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:05:10,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625722069] [2021-05-02 20:05:10,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:05:10,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:10,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:05:10,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:05:10,460 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:10,795 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-05-02 20:05:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:05:10,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2021-05-02 20:05:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:10,797 INFO L225 Difference]: With dead ends: 112 [2021-05-02 20:05:10,797 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 20:05:10,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:05:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 20:05:10,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2021-05-02 20:05:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 61 states have internal predecessors, (71), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:05:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-05-02 20:05:10,801 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 45 [2021-05-02 20:05:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:10,801 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-05-02 20:05:10,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-05-02 20:05:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:05:10,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:10,802 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:11,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:05:11,003 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:11,003 INFO L82 PathProgramCache]: Analyzing trace with hash -889480684, now seen corresponding path program 9 times [2021-05-02 20:05:11,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:11,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905546524] [2021-05-02 20:05:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:11,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:11,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349633489] [2021-05-02 20:05:11,009 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 [2021-05-02 20:05:14,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:05:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:05:14,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:05:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:14,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:14,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:14,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:14,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:05:14,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:14,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905546524] [2021-05-02 20:05:14,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349633489] [2021-05-02 20:05:14,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349633489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:14,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:14,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:05:14,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141020581] [2021-05-02 20:05:14,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:05:14,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:05:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:05:14,444 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:05:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:14,481 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-05-02 20:05:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:05:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:05:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:14,482 INFO L225 Difference]: With dead ends: 87 [2021-05-02 20:05:14,482 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:05:14,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:05:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:05:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:05:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:05:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-05-02 20:05:14,493 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 47 [2021-05-02 20:05:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:14,493 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-05-02 20:05:14,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:05:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-05-02 20:05:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:05:14,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:14,497 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:14,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:05:14,705 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -82028758, now seen corresponding path program 10 times [2021-05-02 20:05:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:14,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481659460] [2021-05-02 20:05:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:14,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:14,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646035835] [2021-05-02 20:05:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:05:14,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:05:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:05:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:05:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:15,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:15,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:15,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:15,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:15,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:15,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:05:15,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:15,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481659460] [2021-05-02 20:05:15,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:15,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646035835] [2021-05-02 20:05:15,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646035835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:15,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:15,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:05:15,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555565248] [2021-05-02 20:05:15,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:05:15,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:15,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:05:15,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:05:15,256 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:15,693 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2021-05-02 20:05:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:05:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-05-02 20:05:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:15,694 INFO L225 Difference]: With dead ends: 129 [2021-05-02 20:05:15,694 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 20:05:15,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:05:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 20:05:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-05-02 20:05:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 77 states have internal predecessors, (91), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:05:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-05-02 20:05:15,704 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 47 [2021-05-02 20:05:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:15,705 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-05-02 20:05:15,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:05:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-05-02 20:05:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:05:15,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:15,706 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:15,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:05:15,910 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1243262931, now seen corresponding path program 11 times [2021-05-02 20:05:15,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:15,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247107745] [2021-05-02 20:05:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:15,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309177219] [2021-05-02 20:05:15,926 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 [2021-05-02 20:05:16,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 20:05:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:05:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 20:05:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:16,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 20:05:16,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247107745] [2021-05-02 20:05:16,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309177219] [2021-05-02 20:05:16,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309177219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:16,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:16,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:05:16,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733371844] [2021-05-02 20:05:16,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:05:16,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:05:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:05:16,582 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:05:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:17,057 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2021-05-02 20:05:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:05:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-05-02 20:05:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:17,078 INFO L225 Difference]: With dead ends: 139 [2021-05-02 20:05:17,078 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 20:05:17,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:05:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 20:05:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2021-05-02 20:05:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.184782608695652) internal successors, (109), 96 states have internal predecessors, (109), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:05:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2021-05-02 20:05:17,083 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 49 [2021-05-02 20:05:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:17,083 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2021-05-02 20:05:17,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:05:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2021-05-02 20:05:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:05:17,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:17,084 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:17,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:05:17,287 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1748821556, now seen corresponding path program 1 times [2021-05-02 20:05:17,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:17,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383243060] [2021-05-02 20:05:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:17,301 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:17,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915341784] [2021-05-02 20:05:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:05:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:05:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:05:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:05:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:05:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:05:17,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:05:17,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383243060] [2021-05-02 20:05:17,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:05:17,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915341784] [2021-05-02 20:05:17,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915341784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:05:17,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:05:17,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:05:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058264819] [2021-05-02 20:05:17,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:05:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:05:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:05:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:05:17,717 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:05:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:05:17,989 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-05-02 20:05:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:05:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-05-02 20:05:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:05:17,990 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:05:17,990 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 20:05:17,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:05:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 20:05:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-05-02 20:05:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 89 states have internal predecessors, (104), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:05:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-05-02 20:05:17,994 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 49 [2021-05-02 20:05:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:05:17,994 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-05-02 20:05:17,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:05:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-05-02 20:05:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:05:17,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:05:17,995 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:05:18,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:05:18,197 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:05:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:05:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash -435811005, now seen corresponding path program 12 times [2021-05-02 20:05:18,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:05:18,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92287369] [2021-05-02 20:05:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:05:18,203 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:05:18,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895308827] [2021-05-02 20:05:18,204 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:06:35,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 20:06:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:06:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 20:06:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:06:36,528 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-02 20:06:36,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:06:36,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92287369] [2021-05-02 20:06:36,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:06:36,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895308827] [2021-05-02 20:06:36,542 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:06:36,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:06:36,755 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_37_48_101_169 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.constructQuantifiedFormula(TermDomainOperationProvider.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.modularPostconditionCall(PredicateTransformer.java:178) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:174) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:06:36,758 INFO L168 Benchmark]: Toolchain (without parser) took 109685.76 ms. Allocated memory was 204.5 MB in the beginning and 294.6 MB in the end (delta: 90.2 MB). Free memory was 169.7 MB in the beginning and 240.0 MB in the end (delta: -70.3 MB). Peak memory consumption was 20.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 204.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.54 ms. Allocated memory is still 204.5 MB. Free memory was 169.5 MB in the beginning and 187.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L168 Benchmark]: Boogie Preprocessor took 19.27 ms. Allocated memory is still 204.5 MB. Free memory was 187.7 MB in the beginning and 186.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L168 Benchmark]: RCFGBuilder took 296.24 ms. Allocated memory is still 204.5 MB. Free memory was 186.1 MB in the beginning and 170.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L168 Benchmark]: IcfgTransformer took 13.92 ms. Allocated memory is still 204.5 MB. Free memory was 170.9 MB in the beginning and 169.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L168 Benchmark]: TraceAbstraction took 109077.99 ms. Allocated memory was 204.5 MB in the beginning and 294.6 MB in the end (delta: 90.2 MB). Free memory was 169.3 MB in the beginning and 240.0 MB in the end (delta: -70.6 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:06:36,758 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 204.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.54 ms. Allocated memory is still 204.5 MB. Free memory was 169.5 MB in the beginning and 187.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.27 ms. Allocated memory is still 204.5 MB. Free memory was 187.7 MB in the beginning and 186.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 296.24 ms. Allocated memory is still 204.5 MB. Free memory was 186.1 MB in the beginning and 170.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.92 ms. Allocated memory is still 204.5 MB. Free memory was 170.9 MB in the beginning and 169.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 109077.99 ms. Allocated memory was 204.5 MB in the beginning and 294.6 MB in the end (delta: 90.2 MB). Free memory was 169.3 MB in the beginning and 240.0 MB in the end (delta: -70.6 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_37_48_101_169 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_37_48_101_169 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...