/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/hard2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:15:01,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:15:01,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:15:01,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:15:01,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:15:01,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:15:01,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:15:01,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:15:02,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:15:02,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:15:02,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:15:02,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:15:02,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:15:02,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:15:02,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:15:02,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:15:02,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:15:02,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:15:02,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:15:02,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:15:02,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:15:02,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:15:02,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:15:02,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:15:02,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:15:02,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:15:02,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:15:02,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:15:02,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:15:02,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:15:02,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:15:02,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:15:02,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:15:02,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:15:02,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:15:02,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:15:02,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:15:02,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:15:02,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:15:02,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:15:02,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:15:02,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:15:02,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:15:02,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:15:02,068 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:15:02,068 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:15:02,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:15:02,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:15:02,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:15:02,356 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:15:02,356 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:15:02,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-06 09:15:02,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168b0054c/ca3eba717e0e4a20874f4b623e033a11/FLAG64a581b5c [2021-05-06 09:15:02,805 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:15:02,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-06 09:15:02,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168b0054c/ca3eba717e0e4a20874f4b623e033a11/FLAG64a581b5c [2021-05-06 09:15:02,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168b0054c/ca3eba717e0e4a20874f4b623e033a11 [2021-05-06 09:15:02,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:15:02,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:15:02,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:15:02,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:15:02,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:15:02,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:15:02" (1/1) ... [2021-05-06 09:15:02,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180cf7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:02, skipping insertion in model container [2021-05-06 09:15:02,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:15:02" (1/1) ... [2021-05-06 09:15:02,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:15:02,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:15:02,956 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/hard2_valuebound2.c[526,539] [2021-05-06 09:15:02,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:15:02,974 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:15:02,984 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/hard2_valuebound2.c[526,539] [2021-05-06 09:15:02,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:15:03,005 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:15:03,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03 WrapperNode [2021-05-06 09:15:03,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:15:03,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:15:03,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:15:03,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:15:03,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:15:03,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:15:03,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:15:03,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:15:03,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:15:03,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:15:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:15:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:15:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:15:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:15:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:15:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:15:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:15:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:15:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:15:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:15:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:15:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:15:03,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:15:03,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:15:03,385 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:15:03,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:15:03 BoogieIcfgContainer [2021-05-06 09:15:03,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:15:03,387 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:15:03,387 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:15:03,387 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:15:03,389 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:15:03" (1/1) ... [2021-05-06 09:15:03,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:15:03 BasicIcfg [2021-05-06 09:15:03,400 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:15:03,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:15:03,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:15:03,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:15:03,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:15:02" (1/4) ... [2021-05-06 09:15:03,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23564ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:15:03, skipping insertion in model container [2021-05-06 09:15:03,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:03" (2/4) ... [2021-05-06 09:15:03,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23564ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:15:03, skipping insertion in model container [2021-05-06 09:15:03,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:15:03" (3/4) ... [2021-05-06 09:15:03,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23564ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:15:03, skipping insertion in model container [2021-05-06 09:15:03,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:15:03" (4/4) ... [2021-05-06 09:15:03,405 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.cJordan [2021-05-06 09:15:03,409 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:15:03,412 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:15:03,435 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:15:03,449 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:15:03,449 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:15:03,449 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:15:03,449 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:15:03,449 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:15:03,450 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:15:03,450 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:15:03,450 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:15:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:15:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:15:03,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:03,464 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:03,464 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 09:15:03,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:03,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940349954] [2021-05-06 09:15:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:03,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:15:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:03,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:15:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:15:03,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:03,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940349954] [2021-05-06 09:15:03,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940349954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:03,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:03,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:15:03,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84224830] [2021-05-06 09:15:03,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:15:03,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:15:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:15:03,675 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2021-05-06 09:15:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:03,766 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 09:15:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:15:03,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 17 [2021-05-06 09:15:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:03,773 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:15:03,773 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 09:15:03,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:15:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 09:15:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 09:15:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:15:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 09:15:03,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 09:15:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:03,816 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 09:15:03,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2021-05-06 09:15:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 09:15:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:15:03,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:03,817 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:03,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:15:03,841 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:03,842 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 09:15:03,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:03,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051726830] [2021-05-06 09:15:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:03,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:15:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:03,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:15:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:15:03,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:03,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051726830] [2021-05-06 09:15:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051726830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:03,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:03,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:15:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729244705] [2021-05-06 09:15:03,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:03,996 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:15:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:04,302 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:15:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:15:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:04,304 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:15:04,304 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:15:04,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:15:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 09:15:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:15:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 09:15:04,310 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 09:15:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:04,310 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 09:15:04,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:15:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 09:15:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:15:04,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:04,311 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, 1] [2021-05-06 09:15:04,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:15:04,311 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 09:15:04,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640088623] [2021-05-06 09:15:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:04,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:15:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:04,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:15:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:04,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 09:15:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:15:04,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:04,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640088623] [2021-05-06 09:15:04,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640088623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:04,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:04,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:15:04,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592719028] [2021-05-06 09:15:04,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:04,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:04,407 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:15:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:04,617 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 09:15:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:15:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:04,619 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:15:04,619 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:15:04,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:15:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 09:15:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:15:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 09:15:04,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 09:15:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:04,624 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 09:15:04,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:15:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 09:15:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:15:04,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:04,625 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:04,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:15:04,625 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 09:15:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:04,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455063353] [2021-05-06 09:15:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:04,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:04,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024433464] [2021-05-06 09:15:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:15:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:04,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:15:04,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:04,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455063353] [2021-05-06 09:15:04,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:04,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024433464] [2021-05-06 09:15:04,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024433464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:04,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:04,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:15:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691278220] [2021-05-06 09:15:04,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:15:04,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:15:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:15:04,807 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:15:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:04,847 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-05-06 09:15:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:15:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 09:15:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:04,848 INFO L225 Difference]: With dead ends: 53 [2021-05-06 09:15:04,848 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 09:15:04,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 09:15:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 09:15:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:15:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 09:15:04,854 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 09:15:04,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:04,854 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 09:15:04,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:15:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 09:15:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:15:04,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:04,855 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:05,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:05,074 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 09:15:05,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:05,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782638570] [2021-05-06 09:15:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:05,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:05,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655175256] [2021-05-06 09:15:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:15:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:05,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:15:05,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:05,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782638570] [2021-05-06 09:15:05,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:05,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655175256] [2021-05-06 09:15:05,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655175256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:05,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:05,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:15:05,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862747162] [2021-05-06 09:15:05,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:15:05,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:05,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:15:05,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:15:05,247 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:15:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:05,284 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 09:15:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:15:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 09:15:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:05,286 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:15:05,286 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:15:05,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:15:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 09:15:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:15:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 09:15:05,291 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 09:15:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:05,291 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 09:15:05,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:15:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 09:15:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 09:15:05,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:05,292 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:05,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:05,510 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 09:15:05,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:05,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886108712] [2021-05-06 09:15:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:05,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:05,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768373361] [2021-05-06 09:15:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:05,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:15:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:05,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:15:05,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:05,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886108712] [2021-05-06 09:15:05,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:05,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768373361] [2021-05-06 09:15:05,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768373361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:05,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:05,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:15:05,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245557445] [2021-05-06 09:15:05,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:05,682 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:15:05,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:05,757 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 09:15:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:15:05,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 09:15:05,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:05,759 INFO L225 Difference]: With dead ends: 82 [2021-05-06 09:15:05,759 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 09:15:05,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 09:15:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 09:15:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:15:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 09:15:05,765 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 09:15:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:05,765 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 09:15:05,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:15:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 09:15:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 09:15:05,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:05,767 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:05,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:05,997 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-06 09:15:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:05,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178640057] [2021-05-06 09:15:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:06,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:06,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811914428] [2021-05-06 09:15:06,006 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:06,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:15:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:15:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:06,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:15:06,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:06,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178640057] [2021-05-06 09:15:06,174 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811914428] [2021-05-06 09:15:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811914428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:06,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:06,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:15:06,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527684226] [2021-05-06 09:15:06,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:15:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:15:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:06,176 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:15:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:06,282 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-05-06 09:15:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 09:15:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:06,284 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:15:06,284 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 09:15:06,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 09:15:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 09:15:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:15:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 09:15:06,292 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 09:15:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:06,292 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 09:15:06,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:15:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 09:15:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 09:15:06,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:06,293 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:06,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:06,512 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-06 09:15:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:06,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390469535] [2021-05-06 09:15:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:06,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:06,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943389715] [2021-05-06 09:15:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:15:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:06,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:15:06,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390469535] [2021-05-06 09:15:06,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943389715] [2021-05-06 09:15:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943389715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:06,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:06,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:15:06,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29716281] [2021-05-06 09:15:06,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:15:06,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:15:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:06,753 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:15:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:06,834 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-05-06 09:15:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 09:15:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:06,836 INFO L225 Difference]: With dead ends: 125 [2021-05-06 09:15:06,836 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 09:15:06,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 09:15:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 09:15:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:15:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 09:15:06,843 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 09:15:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:06,844 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 09:15:06,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:15:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 09:15:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 09:15:06,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:06,845 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:07,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:07,063 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-06 09:15:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:07,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19572497] [2021-05-06 09:15:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:07,071 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:07,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574436458] [2021-05-06 09:15:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:15:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:15:07,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:07,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19572497] [2021-05-06 09:15:07,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:07,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574436458] [2021-05-06 09:15:07,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574436458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:07,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:07,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:15:07,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459644251] [2021-05-06 09:15:07,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:15:07,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:15:07,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:07,314 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:15:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:07,392 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:15:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 09:15:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:07,394 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:15:07,394 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 09:15:07,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 09:15:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 09:15:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 09:15:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 09:15:07,399 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 09:15:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:07,399 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 09:15:07,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:15:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 09:15:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 09:15:07,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:07,401 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:07,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:07,620 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -273867048, now seen corresponding path program 3 times [2021-05-06 09:15:07,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:07,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808537409] [2021-05-06 09:15:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:07,627 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:07,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100611931] [2021-05-06 09:15:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:07,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:15:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:07,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:15:07,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:07,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:07,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 09:15:07,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808537409] [2021-05-06 09:15:07,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100611931] [2021-05-06 09:15:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100611931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:07,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:07,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:15:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535700554] [2021-05-06 09:15:07,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:15:07,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:07,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:15:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:07,934 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:15:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:08,042 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 09:15:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:15:08,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 09:15:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:08,044 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:15:08,044 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 09:15:08,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:15:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 09:15:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 09:15:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:15:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 09:15:08,051 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 09:15:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:08,051 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 09:15:08,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:15:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 09:15:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 09:15:08,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:08,052 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:08,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 09:15:08,271 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1708305639, now seen corresponding path program 2 times [2021-05-06 09:15:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:08,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308987881] [2021-05-06 09:15:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:08,278 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:08,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49502801] [2021-05-06 09:15:08,278 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:08,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:15:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:15:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:08,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 09:15:08,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308987881] [2021-05-06 09:15:08,533 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:08,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49502801] [2021-05-06 09:15:08,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49502801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:08,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:08,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:15:08,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400732477] [2021-05-06 09:15:08,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:15:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:15:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:08,535 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:15:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:08,659 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-05-06 09:15:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:15:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 09:15:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:08,661 INFO L225 Difference]: With dead ends: 136 [2021-05-06 09:15:08,661 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:15:08,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:15:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 09:15:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:15:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 09:15:08,666 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 09:15:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:08,666 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 09:15:08,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:15:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 09:15:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:15:08,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:08,667 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:08,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 09:15:08,887 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 3 times [2021-05-06 09:15:08,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:08,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820604704] [2021-05-06 09:15:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:08,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:08,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137989851] [2021-05-06 09:15:08,894 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:08,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:15:08,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 09:15:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:15:09,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:09,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820604704] [2021-05-06 09:15:09,174 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:09,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137989851] [2021-05-06 09:15:09,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137989851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:09,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:09,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:15:09,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451018851] [2021-05-06 09:15:09,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:15:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:15:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:09,175 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:09,313 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-05-06 09:15:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:15:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:15:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:09,315 INFO L225 Difference]: With dead ends: 98 [2021-05-06 09:15:09,315 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 09:15:09,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-06 09:15:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 09:15:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-05-06 09:15:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 61 states have internal predecessors, (61), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 09:15:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-05-06 09:15:09,319 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 94 [2021-05-06 09:15:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:09,320 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-05-06 09:15:09,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-05-06 09:15:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:15:09,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:09,321 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:09,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:09,540 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:09,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1077967713, now seen corresponding path program 1 times [2021-05-06 09:15:09,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:09,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544190315] [2021-05-06 09:15:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:09,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:09,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207577130] [2021-05-06 09:15:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:15:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:09,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 09:15:09,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544190315] [2021-05-06 09:15:09,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:09,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207577130] [2021-05-06 09:15:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207577130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:15:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713918352] [2021-05-06 09:15:09,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:09,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:09,831 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:09,889 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-05-06 09:15:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:15:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:15:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:09,890 INFO L225 Difference]: With dead ends: 88 [2021-05-06 09:15:09,890 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 09:15:09,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 09:15:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 09:15:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.0) internal successors, (54), 54 states have internal predecessors, (54), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 09:15:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-05-06 09:15:09,894 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 94 [2021-05-06 09:15:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:09,894 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-05-06 09:15:09,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-05-06 09:15:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 09:15:09,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:09,895 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:10,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:10,115 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash -417708177, now seen corresponding path program 1 times [2021-05-06 09:15:10,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:10,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614267817] [2021-05-06 09:15:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:10,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:10,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504477765] [2021-05-06 09:15:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 09:15:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 09:15:10,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614267817] [2021-05-06 09:15:10,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:10,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504477765] [2021-05-06 09:15:10,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504477765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:10,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:10,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:15:10,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24115919] [2021-05-06 09:15:10,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:15:10,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:10,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:15:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:15:10,540 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:15:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:10,665 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-05-06 09:15:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:15:10,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 09:15:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:10,666 INFO L225 Difference]: With dead ends: 84 [2021-05-06 09:15:10,666 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 09:15:10,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:15:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 09:15:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 09:15:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 09:15:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 09:15:10,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2021-05-06 09:15:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:10,667 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 09:15:10,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:15:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 09:15:10,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 09:15:10,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 09:15:10,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:15:10 BasicIcfg [2021-05-06 09:15:10,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 09:15:10,885 INFO L168 Benchmark]: Toolchain (without parser) took 8062.64 ms. Allocated memory was 201.3 MB in the beginning and 363.9 MB in the end (delta: 162.5 MB). Free memory was 165.4 MB in the beginning and 254.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 74.1 MB. Max. memory is 8.0 GB. [2021-05-06 09:15:10,885 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 201.3 MB. Free memory is still 182.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:15:10,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.15 ms. Allocated memory is still 201.3 MB. Free memory was 165.1 MB in the beginning and 155.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 09:15:10,886 INFO L168 Benchmark]: Boogie Preprocessor took 84.05 ms. Allocated memory is still 201.3 MB. Free memory was 155.3 MB in the beginning and 184.2 MB in the end (delta: -28.9 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 09:15:10,886 INFO L168 Benchmark]: RCFGBuilder took 294.79 ms. Allocated memory is still 201.3 MB. Free memory was 183.8 MB in the beginning and 168.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 09:15:10,886 INFO L168 Benchmark]: IcfgTransformer took 12.97 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 167.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 09:15:10,886 INFO L168 Benchmark]: TraceAbstraction took 7484.02 ms. Allocated memory was 201.3 MB in the beginning and 363.9 MB in the end (delta: 162.5 MB). Free memory was 167.0 MB in the beginning and 254.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. [2021-05-06 09:15:10,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 201.3 MB. Free memory is still 182.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 182.15 ms. Allocated memory is still 201.3 MB. Free memory was 165.1 MB in the beginning and 155.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.05 ms. Allocated memory is still 201.3 MB. Free memory was 155.3 MB in the beginning and 184.2 MB in the end (delta: -28.9 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 294.79 ms. Allocated memory is still 201.3 MB. Free memory was 183.8 MB in the beginning and 168.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.97 ms. Allocated memory is still 201.3 MB. Free memory was 168.8 MB in the beginning and 167.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7484.02 ms. Allocated memory was 201.3 MB in the beginning and 363.9 MB in the end (delta: 162.5 MB). Free memory was 167.0 MB in the beginning and 254.3 MB in the end (delta: -87.2 MB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7434.0ms, OverallIterations: 14, TraceHistogramMax: 16, EmptinessCheckTime: 16.8ms, AutomataDifference: 1628.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 573 SDtfs, 221 SDslu, 1954 SDs, 0 SdLazy, 1429 SolverSat, 200 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 907.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 798 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 859.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=11, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 94.8ms AutomataMinimizationTime, 14 MinimizatonAttempts, 25 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 91.9ms SsaConstructionTime, 335.4ms SatisfiabilityAnalysisTime, 2127.1ms InterpolantComputationTime, 813 NumberOfCodeBlocks, 754 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 3164 SizeOfPredicates, 23 NumberOfNonLiveVariables, 2155 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 2192/2297 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...