/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/sqrt1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:00,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:00,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:00,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:51:00,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:51:00,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:51:00,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:51:00,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:51:00,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:51:00,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:51:00,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:51:00,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:51:00,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:00,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:00,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:00,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:00,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:00,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:00,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:00,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:00,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:00,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:00,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:00,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:00,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:00,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:00,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:00,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:00,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:00,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:00,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:00,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:00,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:00,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:00,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:00,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:00,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:00,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:00,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:00,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:00,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:00,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:00,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:00,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:00,104 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:00,104 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:00,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:00,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:00,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:00,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:00,366 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:00,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-05-02 22:51:00,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd79753a/039973e575cf4d419a5caecd19a71113/FLAG2a6eb31cb [2021-05-02 22:51:00,752 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:00,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-05-02 22:51:00,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd79753a/039973e575cf4d419a5caecd19a71113/FLAG2a6eb31cb [2021-05-02 22:51:01,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd79753a/039973e575cf4d419a5caecd19a71113 [2021-05-02 22:51:01,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:01,201 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:01,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:01,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:01,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:01,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25758a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01, skipping insertion in model container [2021-05-02 22:51:01,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:01,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:01,307 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/sqrt1-ll_unwindbound5.c[520,533] [2021-05-02 22:51:01,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:01,321 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:01,329 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/sqrt1-ll_unwindbound5.c[520,533] [2021-05-02 22:51:01,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:01,349 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:01,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01 WrapperNode [2021-05-02 22:51:01,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:01,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:01,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:01,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:01,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:01,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:01,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:01,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:01,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:01,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:01,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:01,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:01,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:01,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:01,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:01,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:01,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:01,699 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:01,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:01 BoogieIcfgContainer [2021-05-02 22:51:01,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:01,701 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:01,701 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:01,701 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:01,703 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:01" (1/1) ... [2021-05-02 22:51:01,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:01 BasicIcfg [2021-05-02 22:51:01,733 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:01,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:01,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:01,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:01,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:01" (1/4) ... [2021-05-02 22:51:01,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398c49a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:01, skipping insertion in model container [2021-05-02 22:51:01,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:01" (2/4) ... [2021-05-02 22:51:01,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398c49a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:01, skipping insertion in model container [2021-05-02 22:51:01,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:01" (3/4) ... [2021-05-02 22:51:01,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398c49a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:01, skipping insertion in model container [2021-05-02 22:51:01,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:01" (4/4) ... [2021-05-02 22:51:01,749 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.cJordan [2021-05-02 22:51:01,753 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:01,755 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:01,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:01,793 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:01,793 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:01,793 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:01,793 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:01,793 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:01,793 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:01,793 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:01,793 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:51:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:51:01,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:01,806 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:01,807 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-02 22:51:01,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:01,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939910710] [2021-05-02 22:51:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:02,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:02,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939910710] [2021-05-02 22:51:02,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939910710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:02,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:02,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:02,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852095711] [2021-05-02 22:51:02,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:02,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:02,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:02,040 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:51:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:02,119 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 22:51:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:51:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:02,127 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:51:02,127 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:51:02,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:51:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 22:51:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:51:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 22:51:02,155 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 22:51:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:02,156 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 22:51:02,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:51:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 22:51:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:51:02,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:02,157 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:02,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:02,158 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-02 22:51:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:02,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173300626] [2021-05-02 22:51:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:02,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:02,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173300626] [2021-05-02 22:51:02,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173300626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:02,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:02,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:51:02,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40216647] [2021-05-02 22:51:02,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:51:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:51:02,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:51:02,341 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:51:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:02,453 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-02 22:51:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:51:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:02,454 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:51:02,454 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 22:51:02,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 22:51:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 22:51:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:51:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 22:51:02,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 22:51:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:02,458 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 22:51:02,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:51:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 22:51:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:51:02,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:02,459 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:02,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:02,459 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-02 22:51:02,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:02,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359063318] [2021-05-02 22:51:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:02,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:02,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359063318] [2021-05-02 22:51:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359063318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:02,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:02,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:02,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402661252] [2021-05-02 22:51:02,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:02,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:02,530 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:51:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:02,738 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-02 22:51:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:51:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:02,739 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:51:02,740 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:51:02,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:51:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 22:51:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 22:51:02,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 22:51:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:02,745 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 22:51:02,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:51:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 22:51:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:02,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:02,746 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:02,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 22:51:02,746 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:02,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-02 22:51:02,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:02,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217300489] [2021-05-02 22:51:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:02,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:02,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494593380] [2021-05-02 22:51:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:02,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:02,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217300489] [2021-05-02 22:51:02,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:02,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494593380] [2021-05-02 22:51:02,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494593380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:02,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:02,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953853642] [2021-05-02 22:51:02,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:02,922 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:51:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:03,022 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:03,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:03,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 22:51:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:03,023 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:03,023 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:51:03,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:51:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:51:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 22:51:03,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 22:51:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:03,027 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 22:51:03,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:51:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 22:51:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:51:03,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:03,028 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:03,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:03,249 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-02 22:51:03,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:03,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699628101] [2021-05-02 22:51:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:03,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:03,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212057560] [2021-05-02 22:51:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:51:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:03,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:03,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699628101] [2021-05-02 22:51:03,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:03,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212057560] [2021-05-02 22:51:03,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212057560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:03,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:03,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:51:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971985615] [2021-05-02 22:51:03,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:51:03,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:51:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:51:03,418 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:51:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:03,465 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 22:51:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:03,468 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:51:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:03,470 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:51:03,470 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 22:51:03,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 22:51:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 22:51:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 22:51:03,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 30 [2021-05-02 22:51:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:03,480 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 22:51:03,481 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:51:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 22:51:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:51:03,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:03,482 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:03,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:03,697 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-02 22:51:03,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:03,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119867412] [2021-05-02 22:51:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:03,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:03,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099013662] [2021-05-02 22:51:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:03,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:03,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119867412] [2021-05-02 22:51:03,828 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:03,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099013662] [2021-05-02 22:51:03,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099013662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:03,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:03,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220303156] [2021-05-02 22:51:03,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:03,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:03,829 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (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) [2021-05-02 22:51:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:03,875 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 22:51:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:03,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (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 30 [2021-05-02 22:51:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:03,876 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:51:03,876 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:51:03,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:51:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:51:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-05-02 22:51:03,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 30 [2021-05-02 22:51:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:03,880 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-05-02 22:51:03,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (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) [2021-05-02 22:51:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-05-02 22:51:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 22:51:03,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:03,881 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:04,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:04,096 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:04,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-02 22:51:04,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:04,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587141424] [2021-05-02 22:51:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:04,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866755583] [2021-05-02 22:51:04,103 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 [2021-05-02 22:51:04,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:51:04,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:04,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:04,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:04,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587141424] [2021-05-02 22:51:04,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866755583] [2021-05-02 22:51:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866755583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:04,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:04,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:04,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044211699] [2021-05-02 22:51:04,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:04,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:04,297 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:51:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:04,472 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-02 22:51:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 22:51:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:04,473 INFO L225 Difference]: With dead ends: 52 [2021-05-02 22:51:04,473 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:51:04,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:51:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:51:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:51:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:51:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 22:51:04,479 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 22:51:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:04,479 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 22:51:04,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:51:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 22:51:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:51:04,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:04,480 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:04,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:04,697 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-02 22:51:04,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:04,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211203503] [2021-05-02 22:51:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:04,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:04,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297587397] [2021-05-02 22:51:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:04,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:04,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:51:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:04,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:51:04,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:04,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211203503] [2021-05-02 22:51:04,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:04,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297587397] [2021-05-02 22:51:04,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297587397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:04,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:04,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:04,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759976169] [2021-05-02 22:51:04,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:04,849 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:04,888 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 22:51:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 22:51:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:04,889 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:04,889 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:04,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 22:51:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:51:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 22:51:04,893 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2021-05-02 22:51:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:04,893 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 22:51:04,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 22:51:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:51:04,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:04,894 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:05,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:05,110 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 3 times [2021-05-02 22:51:05,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:05,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652725824] [2021-05-02 22:51:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:05,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:05,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082394613] [2021-05-02 22:51:05,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:05,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:05,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:05,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:05,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652725824] [2021-05-02 22:51:05,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:05,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082394613] [2021-05-02 22:51:05,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082394613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:05,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:05,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:05,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798267173] [2021-05-02 22:51:05,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:05,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:05,260 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (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) [2021-05-02 22:51:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:05,317 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 22:51:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (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 48 [2021-05-02 22:51:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:05,319 INFO L225 Difference]: With dead ends: 62 [2021-05-02 22:51:05,319 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:51:05,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:51:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 22:51:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-05-02 22:51:05,322 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2021-05-02 22:51:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:05,323 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-05-02 22:51:05,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (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) [2021-05-02 22:51:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-05-02 22:51:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 22:51:05,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:05,323 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:05,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:05,537 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 4 times [2021-05-02 22:51:05,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:05,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680545535] [2021-05-02 22:51:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:05,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:05,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493431748] [2021-05-02 22:51:05,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:05,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:05,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:51:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:05,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 22:51:05,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680545535] [2021-05-02 22:51:05,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493431748] [2021-05-02 22:51:05,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493431748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:05,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:05,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:05,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531829995] [2021-05-02 22:51:05,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:05,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:05,790 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:51:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:13,238 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-05-02 22:51:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:13,238 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 22:51:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:13,240 INFO L225 Difference]: With dead ends: 64 [2021-05-02 22:51:13,240 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:51:13,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:51:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 22:51:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-05-02 22:51:13,247 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 53 [2021-05-02 22:51:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:13,247 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-05-02 22:51:13,247 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:51:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-05-02 22:51:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 22:51:13,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:13,248 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:13,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:13,449 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1316272605, now seen corresponding path program 1 times [2021-05-02 22:51:13,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:13,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230819163] [2021-05-02 22:51:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:13,455 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:13,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206785451] [2021-05-02 22:51:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:13,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:51:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:13,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:13,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:13,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:13,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:13,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:13,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 22:51:13,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:13,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230819163] [2021-05-02 22:51:13,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:13,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206785451] [2021-05-02 22:51:13,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206785451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:13,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:13,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:13,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545543753] [2021-05-02 22:51:13,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:13,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:13,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:13,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:13,656 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 22:51:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:17,655 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-05-02 22:51:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-05-02 22:51:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:17,658 INFO L225 Difference]: With dead ends: 71 [2021-05-02 22:51:17,658 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 22:51:17,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 22:51:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-05-02 22:51:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 15 states have call successors, (15), 10 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-05-02 22:51:17,661 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 74 [2021-05-02 22:51:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:17,661 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-05-02 22:51:17,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 22:51:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-05-02 22:51:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 22:51:17,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:17,662 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:17,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 22:51:17,869 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:17,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1842005024, now seen corresponding path program 1 times [2021-05-02 22:51:17,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:17,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441186430] [2021-05-02 22:51:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:17,874 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:17,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929177631] [2021-05-02 22:51:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:51:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 90 proven. 132 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 22:51:18,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:18,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441186430] [2021-05-02 22:51:18,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:18,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929177631] [2021-05-02 22:51:18,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929177631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:18,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:18,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:18,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190346324] [2021-05-02 22:51:18,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:18,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:18,073 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:18,142 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-05-02 22:51:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:18,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-02 22:51:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:18,145 INFO L225 Difference]: With dead ends: 71 [2021-05-02 22:51:18,145 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 22:51:18,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 22:51:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 22:51:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 17 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:51:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-05-02 22:51:18,155 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 76 [2021-05-02 22:51:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:18,156 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-05-02 22:51:18,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-05-02 22:51:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 22:51:18,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:18,160 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:18,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:18,373 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1541294431, now seen corresponding path program 2 times [2021-05-02 22:51:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:18,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977962575] [2021-05-02 22:51:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:18,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:18,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090855303] [2021-05-02 22:51:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:18,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:18,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 22:51:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:18,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 22:51:18,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977962575] [2021-05-02 22:51:18,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090855303] [2021-05-02 22:51:18,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090855303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:18,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:18,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:18,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765309844] [2021-05-02 22:51:18,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:18,607 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 22:51:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:18,681 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-05-02 22:51:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:51:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 94 [2021-05-02 22:51:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:18,682 INFO L225 Difference]: With dead ends: 81 [2021-05-02 22:51:18,682 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 22:51:18,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:51:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 22:51:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 22:51:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 20 states have call successors, (20), 12 states have call predecessors, (20), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:51:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-05-02 22:51:18,686 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 94 [2021-05-02 22:51:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:18,686 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-05-02 22:51:18,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 22:51:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-05-02 22:51:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 22:51:18,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:18,687 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:18,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:18,907 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash 753442014, now seen corresponding path program 3 times [2021-05-02 22:51:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:18,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462016556] [2021-05-02 22:51:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:18,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:18,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11211126] [2021-05-02 22:51:18,913 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:18,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:51:18,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:19,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:19,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:29,230 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 22:51:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:29,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 171 proven. 3 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-05-02 22:51:29,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:29,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462016556] [2021-05-02 22:51:29,256 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:29,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11211126] [2021-05-02 22:51:29,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11211126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:29,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:29,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562517625] [2021-05-02 22:51:29,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:29,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:29,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 22:51:29,258 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:37,328 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 22:52:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:07,906 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-05-02 22:52:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:52:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 112 [2021-05-02 22:52:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:07,906 INFO L225 Difference]: With dead ends: 95 [2021-05-02 22:52:07,906 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:52:07,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 18191.3ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 22:52:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:52:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:52:07,907 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) [2021-05-02 22:52:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:52:07,907 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2021-05-02 22:52:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:07,907 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:52:07,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:52:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:52:07,907 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:52:08,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:52:08,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:52:08 BasicIcfg [2021-05-02 22:52:08,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:52:08,111 INFO L168 Benchmark]: Toolchain (without parser) took 66911.18 ms. Allocated memory was 203.4 MB in the beginning and 253.8 MB in the end (delta: 50.3 MB). Free memory was 167.9 MB in the beginning and 91.2 MB in the end (delta: 76.7 MB). Peak memory consumption was 127.8 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 203.4 MB. Free memory is still 185.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.81 ms. Allocated memory is still 203.4 MB. Free memory was 167.7 MB in the beginning and 188.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 INFO L168 Benchmark]: Boogie Preprocessor took 40.76 ms. Allocated memory is still 203.4 MB. Free memory was 188.0 MB in the beginning and 186.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 INFO L168 Benchmark]: RCFGBuilder took 308.23 ms. Allocated memory is still 203.4 MB. Free memory was 186.4 MB in the beginning and 171.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 INFO L168 Benchmark]: IcfgTransformer took 32.92 ms. Allocated memory is still 203.4 MB. Free memory was 171.6 MB in the beginning and 170.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 INFO L168 Benchmark]: TraceAbstraction took 66366.22 ms. Allocated memory was 203.4 MB in the beginning and 253.8 MB in the end (delta: 50.3 MB). Free memory was 169.8 MB in the beginning and 91.2 MB in the end (delta: 78.6 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:08,112 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 203.4 MB. Free memory is still 185.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 144.81 ms. Allocated memory is still 203.4 MB. Free memory was 167.7 MB in the beginning and 188.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.76 ms. Allocated memory is still 203.4 MB. Free memory was 188.0 MB in the beginning and 186.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 308.23 ms. Allocated memory is still 203.4 MB. Free memory was 186.4 MB in the beginning and 171.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 32.92 ms. Allocated memory is still 203.4 MB. Free memory was 171.6 MB in the beginning and 170.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 66366.22 ms. Allocated memory was 203.4 MB in the beginning and 253.8 MB in the end (delta: 50.3 MB). Free memory was 169.8 MB in the beginning and 91.2 MB in the end (delta: 78.6 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 66317.2ms, OverallIterations: 14, TraceHistogramMax: 18, EmptinessCheckTime: 18.5ms, AutomataDifference: 51154.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 377 SDtfs, 126 SDslu, 1055 SDs, 0 SdLazy, 804 SolverSat, 118 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 42363.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 653 GetRequests, 555 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 18809.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=13, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.2ms AutomataMinimizationTime, 14 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 95.1ms SsaConstructionTime, 336.7ms SatisfiabilityAnalysisTime, 11799.4ms InterpolantComputationTime, 652 NumberOfCodeBlocks, 566 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 638 ConstructedInterpolants, 0 QuantifiedInterpolants, 1833 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1967 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 1461/1967 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...